I hadn't weighed 100 lbs. since middle school. As Mercedes and myself entered the room, Amy told me to close and lock the door. My heart sank, I have... never been so scared in my life. Even though I had no idea what was about to happen I knew it wasn't going to be good. Or maybe it would be good? I had a million thought running through my mind. Amy told me and Mercedes to take off our clothes and Mercedes asked her why? Amy responded "I am going to teach you how to be real sisters". Amy told. I complied.I stood in the seat of the hot tub and aimed my now swollen crown of my cock at her glistening pussy and even as I sank the helmet into her, I could feel the greedy gripping of her sex attempting to pull me deep into her core! She was hot, tight and the walls of her pussy absolutely pulsed with desire and lust as I pushed deeper into her.Again, when you are used to doing the same woman you have been with for decades, things grow… stale. In fact, I rarely actually fucked with my. “No…”"C'mon, man. I'm really horny. Please." I don't know... " You can keep the rest of your clothes on, I just need your ass right now. I’ll be fast, I promise." Okay, Okay, Alright," he agreed as he gave in.I turned him around and felt his ass through his pants. I reached around and unbuttoned his pants. I put my hands into his waistband and hastily pulled his boxers and jeans down until his bottom was fully exposed. It was perfect...better than I had imagined. It was the perfect shape, the. It all started after a weekend during which I had gotten a new emeraldgreen, satin evening dress, and a brown, wool skirt suit. Of course Ishowed them off in front of Mike, who for once, seemed to pay a smallbit of attention to what I was doing. That was odd enough, but itdidn't stop there. For the next few days he acted strange, impatient,like he couldn't wait for something to happen. It quickly became amystery that I just had to solve and as it turned out, I didn't havelong to wait.It was.