I smiled at the return of my sister's confident side, the part of her I was more familiar with. It had certainly taken more than a little courage for her to jerk me off those first few times, back before it became routine for us. I had never realized just how much it meant to her.

"Is it okay?" I asked.

"I'm fine, it doesn't hurt very much now. I think it'll get better if you just go gently."

I had even less intention of being rough with her than I had before, regardless of her request. Only barely moving at first, I resumed pushing into sister's pussy. I watched...