I thought about it some more, then said, “Don’t think I’m giving you a free pass to have sex with anyone else.”
“Of course not – except one time with Nina’s future husband. Then the pact is officially over, anyway.” Lisa looked down at my cock, which had started to make a tent in the bed sheets. “See, you are warming up to this idea already. Let’s take care of that erection now. You can fantasize about my sisters as we make love.”
“Or your mom,” I said with a wink and a smile.
Two nights later, the youngest sister Nina came over to our house for dinner. I was awkward and mostly silent as we ate because I knew the plan for “dessert”. Nina is the hottest and most flirtatious of the sisters. She has bleached blond hair and a gorgeous tan. Her 24-year-old body is young, strong, and curvy. I was worried that I might enjoy this a little too much.
As we were clearing the plates, my wife gave me a big hug in the kitchen. She kissed me tenderly, then said, “It’s time. Take Nina to the guest bedroom now. Enjoy her tonight – this is the only shot you’ll get!”
I knew that what we did and how long we stayed in the room were up to me. I also knew that Lisa would be sitting in the living room the whole time. I took Nina by the hand and led her to the guest bedroom. My wife had already dimmed the lights and turned on some soft music in there. She had placed some bottled waters on the dresser, and some lubricating oil on the nightstand. The queen-sized bed was turned down and ready for us.
After I closed the door, I just stood there looking into Nina’s eyes, unsure of what to do. “Relax, I’m a sure thing tonight,” she said. Nina then moved in close, ran her hands up my back, and started swaying with me. We danced slowly for a few songs. She knew I was a little freaked out, so she started kissing me gently on the neck and lips. She whispered in my ear, “I can’t wait to feel your cock inside of me. Lisa told me it was bigger than both of the other in-laws I’ve fucked.”
That was just what I needed. Our hands started roaming all over each other’s bodies. The kissing got more and more passionate. Clothes started coming off quickly. Very soon, we were dancing completely naked.
I laid Nina down on the bed, positioned my cock at the entrance of her soaking wet pussy, and plunged in. The sex was raw and unrestrained. I was a little rough with her, but she matched every thrust. She was very vocal and loud as we fucked, which added to the pleasure. When I was close to cumming, I pulled out and shot my load all over her chest and belly.
I collapsed on the bed beside her as she playfully swiped my cum off her breasts and licked it off her fingers. All I could think of to say was “Thank you. That was great.”
She propped up on her elbows, looked me in the eye and said, “Oh, we’re not done yet, tiger. We just got started.” With that, she took total control of me for the next 3 hours. What a wild vixen she is. We had sex in so many positions I lost count. When I needed a break, she cuddled with me and asked me questions about her sister in bed. Then, I swear she would go out and try to outdo Lisa with the next round. And dammit, she sometimes did.