My life got a little rocky after I married my second wife, Monica, last year. Our relationship was fantastic, but after the wedding and moving in together, I developed a strained relationship with her daughter, Isla.

Don’t get me wrong, Isla is great. She’s bright, driven, sweet, and beautiful. Like any eighteen-year-old, watching her mom get remarried quickly after divorcing her father did not sit well with her, and I stood to bear the brunt of her teenage angst.

Causing additional strain for Isla and me was the fact that she still idolized her real dad. Even when I went out of my way to appease, please, or acquiesce to her, I was inevitably met with an eye roll and dismissal. I had only one ace up my sleeve to repair our relationship before Isla went to college, and I made good use of it.

Isla was a talented runner on the high school track team, and I was a former college track star. There aren’t a lot of things that can help bond two people with more than a thirty-year age difference, but running is one of them.

On non-practice days, Isla was committed to improving her endurance and would run on her own. With her mom still at work, I saw that as an opportunity to get some one-on-one time with her. Although she was skeptical at first, she ultimately softened and allowed me to go jogging to help set the pace.

Weeks passed, and our relationship slowly began to improve. Before long, it felt like she even enjoyed my presence as we went for our weekly runs. She would not admit it, but I could feel the energy shift.

During one of our runs, I could see Isla lagging a bit behind. We ultimately cut the run short and returned home to avoid an injury.

Isla began favoring her left leg, and we could both see that her left hamstring had tightened significantly.

“Can you help me stretch it out?” Isla sat on the floor and lay down on her back, wincing from the tightness she felt.

“Of course, I’ll move it slowly until you feel relief.”

I stood over her as she lay back on the floor with her left leg up. I took her left foot and began assisting her in lifting it to stretch the affected muscle.

“Right there!” she exclaimed, asking that I hold her leg in place at about a 45-degree angle from the ground. “Don’t move,” she reiterated.

Her face and body relaxed as I held her leg in place. As her pain decreased, my ability to tend to the whole leg increased.

I began massaging her left leg, starting with her calf muscle and working my way up to the back of her knee and her injured hamstring.

“Isla, I can feel the knot in your muscle right here. Are you comfortable with me adding some pressure and massaging it out?”

“Yes, anything, it’s feeling better already.” The tension in her voice evaporated.

In the weeks since our running bond was forming, I had done my best to avoid looking at, noticing, or focusing on my stepdaughter’s body in any way. After all, high school track shorts are very short, and the tops also show a considerable amount of skin. I hate to admit it, but Isla’s legs look good in them, and I had a hard time not ignoring that fact.

Making it even more difficult was the relief she was visibly gaining from my massage of her hamstring. Each rub of her hamstring garnered a soft moan and deeper surrender to my touch.

“That feels so good, Daddy.”

“Daddy?” I asked, as she had never called me that before.

“I think maybe I haven’t been fair to you.” She softened as I continued massaging and caressing her leg. “You’ve been good to Mom and me, and I think I’m able to see a different side of you now.”

I matched her vulnerability when I replied, “I understand the transition wasn’t easy for you, sweetheart, but it makes me happy to know we can build our relationship.”

“Can you massage my other leg, too, Daddy?”

She abruptly changed the topic back to my original task. In doing so, I noticed a subtle, mischievous grin as she asked me to massage her other leg. She was still lying flat on her back as I gently lay her left leg down and began working on her right leg.

“You know, I heard you and Mom last night.” The innocence of a stepdad’s care for his stepdaughter was paused as my face began to redden at the suggestion she heard me having sex with her Mom.

“What did you hear, exactly?” I stammered as her smile began to widen.

“I don’t know exactly, but it sounded like Mom was having a good time.”

My hands continued to massage and caress her legs, and before I replied, she began to take more control of the dialogue.

“I’ve never heard her quite as loud as she was last night. Even with my real Dad,” she continued, seductively biting her lip. “What’s your magic secret, Daddy?”

Her eyes darted downward to the growing bulge forming in my shorts as if to imply she already knew my magic secret. By now, I was getting more and more turned on by both her flirty implications and the fact that I was massaging her thighs just inches from her vagina.

“I think my secret is my intense passion, Isla.”

“I don’t think I’ve ever felt passion like that, Daddy.”

I cleared my throat and stammered a bit before finally asking, “Have you ever had sex, Isla?”

“Once, with my boyfriend, but it wasn’t perfect.” She took a deep breath and again appeared more vulnerable. “When I was listening to you and my mom last night, I started to feel jealous.”

“There’s no need to feel jealous, sweetie. You’re a beautiful girl, and you will be able to have the pick of any guys you want. I mean, you’re going to be in college next year. You’ll have to fight them off with a stick!”

“I’m kind of afraid I won’t even know what I’m doing, though.”

She sighed deeply and laid her head back, looking at the ceiling. I wasn’t stretching or massaging her anymore; instead, I was intently listening.

“Do you think you could teach me a few things?”

At this point, I noticed she was gently rubbing herself over her tiny track shorts. Her voice fell into more of a raspy whisper as I kneeled over her, watching, feeling the need to rub my genitals to offer relief.

“What kinds of things do you want me to teach you?” I began to rub my bulge.

She slid her shorts to the side and used her middle finger to rub her clit in a circular motion. Her gorgeous flower was now exposed for me to see as she began to masturbate.

“I don’t know, Daddy, can I just see it?”

I took a deep breath and pulled my shorts down for her. My dick stood proudly erect, and her eyes bulged at the sight.

“You can touch it, too, sweetie. Just don’t tell Mom about this.”

“Never! It will be our secret.” She reached out and began to stroke the shaft carefully at first, then began to speed up as she got comfortable gripping its wide girth with her young hand.

“Mmm, you’re a natural, Isla. You’re making me feel amazing.”

“Good, I want to make you happy, Daddy.” She opened her mouth, leaned in closer, and took my stiff cock between her lips and into her warm, sexy mouth.

She extended her tongue along the base of my cock to my balls. While she sucked on my cock, I took over for her fingers, and after sliding her little shorts off, I began rubbing her sweet pussy lips and clit.

I took off my shirt as she ran her tongue up and down my long, thick shaft. And as she took a break to catch her breath from sucking my dick, I helped her pull her shirt off over her head.

With us now completely naked on the living room floor, we got to our knees and faced each other. We took a moment to examine each other’s naked bodies and began to engage in a sensual kiss.

As our tongues played inside each other’s mouths, our hands wandered up and down our naked torsos. My skin shivered as she explored my chest and abdomen. I felt her nipples stiffen while my fingertips played with her sexy tits.

“I want to feel what it’s like to have you inside me,” she whispered as she kissed my neck.

I traced my finger down her spine and cupped her ass. I rose to my feet and took her by the hands to have her follow suit. My cock remained raging hard as I led Isla to her bedroom.

I closed and locked the door just in case my wife came home early. I laid my stepdaughter down on her bed and began kissing her body up and down. Her toes curled as I kissed her belly. Her fingers ran through my hair as I made my way back to her neck and mouth.

We engaged in another long and sensual kiss until I broke it off and asked, “Are you ready for me?”

“I am. I want you inside me.”

With Isla’s legs spread for me I began to carefully push the head of my cock between her excessively tight pussy lips.

“Fuck, uhhh,” Isla began to wince after I got the first two or three inches inside her.

“We can stop if you need to, sweetie,” I reassured her, feeling her stretch far wider than she had ever been prior.

“No, don’t stop, keep going, Daddy. Uhhh, fuuuck! God you’re so fucking deep inside me!”

I still had considerable length before I would be completely inside her young vagina. To help the process, I reengaged her in another deep and sensual kiss. I felt her moan in my mouth as once again our tongues played together. I began to kiss and suck on her neck, which allowed her entire body to relax. In doing so, I felt her legs wrap around my body, and the base of my cock was buried completely inside her gorgeous body.

“Oh my God, this is amazing! Is this what you do to Mom?”

“You feel so fucking good, Isla.” I began to gently and slowly thrust as her body was now entirely receptive for my large cock engorged inside her quivering pussy.

“Jesus, I didn’t expect it to feel like this. You can do it harder.” All evidence of discomfort had now disappeared, and her face expressed growing ecstasy and pleasure.

I pressed my body against her, holding her securely as we fucked.

“You’re a natural at this, sweetheart.” I kissed her neck and shoulders as I held her close.

The bed began to rock as I pumped my cock harder. She reached back, grabbing onto the headboard, bracing herself from my increasingly powerful thrusts. Her tits bounced gracefully and once again our lips met for a passionate kiss.

Isla’s confidence began to grow by the second.  She put her hands on my chest and asked me to lie on my back. I loved the idea of looking at her teen body ride me, so I naturally complied. She lowered herself back onto my pulsating cock and instantly began rocking her sexy hips.

Her hair fell and tickled my chest as she leaned in. I felt her nipples graze my chin and lips. Our faces were now only an inch apart. Our eyes locked in lust. I wanted to speak, but I couldn't. I felt total sexual bliss.

She pushed herself back up, resting her hands on my chest. The sight of her beautiful teen body alone sent me over the top. Just as I was going to tell her I needed to cum, I felt her sweet teen juices flooding me. Her whimpers grew louder, and she squirted violently while sitting on top of my mammoth cock.

I could no longer hold out and began cumming with her. My hot cum fired inside her tight pink flower while she finished her magnificent orgasm.

“More Daddy, I want more of your cum.” She gyrated and thrashed as if trying to draw every drop of my warm seed deeper inside her.

At last our orgasms had finished, and she fell on top of me. Her lips were at the base of my neck. I put my strong arms around her and held her close again. I kissed her cheek and neck and told her how wonderful she was.

“That was even better than I dreamed.” She returned my kisses and cuddled up safely in my arms.

Isla drifted off to sleep, and I arose to make sure there was no evidence of our indiscretion downstairs for my wife to find.  I picked up our discarded clothing and underwear, straightening everything out.

About an hour later, Monica came home. We sat as she told me about her day. Isla finally descended in time for dinner, dressed in a stunning summer dress. She acted completely normally, and I was relieved knowing our secret was safe.

During dinner, Monica asked if she was ready for her big race the next day.

Isla replied with a wide smile. “Yes, Mom. I feel looser than I’ve ever been!”