Chapter 137 What Big Sisters Are For:>23

I held my sister's hips as she rode me. Every time she came, her pussy got wetter, tighter. I was already so far past the edge. I had survived nearly a week without cumming, after my sister had trained me to go multiple times a day. I'd never had sex, never experienced anything even close to this feeling. It was a miracle I hadn't already cum three times already. "Squeeze my nipples," Darcy said, pulling me back to reality. I reached up and grabbed her cherry nubs. "Harder."