Some experimentation

I sat on my bed holding the doll with both hands, still in awe of how much it resembled my sister. Since my sister turned 18 nearly four months ago, her body had filled out splendidly and I had been fantasizing about playing with her breasts nearly every night. Of course I felt guilty every time those thoughts entered my mind. We also had a pretty good relationship and I wouldn't want to do anything to jeapordize that, especially since we still lived together and saw each other almost every day. But with this doll, maybe I could discover how she would respond to sexual contact without her knowing it was me.

Hesitantly, I placed both of my thumbs on the doll's breasts and began rubbing them in small circles.

"What the - ahh, oh..." I heard Steph's soft sexy moans coming from the bathroom.

"Are you okay in there?" I shouted, trying to sound a little worried instead of excited.

"Yeah, fine - AHH!" She screamed as I began massaging the doll's breasts more vigorously. I placed the doll on the bed, then continued rubbing the breasts with my fingers, allowing my thumbs to explore further. My thumbs slowly made their way down the doll's stomach, then underneath the skirt to where the pussy would be. I began to slowly rub her down there.

"Ohhh... what's happening??? AHH!!!"

"Are you sure you're alright?" I asked