I set a record for undressing, my cock at full size. I scooted between Martha's legs and started licking her pussy. We had done this enough times now that I knew just what she liked. When I sensed that she was nearing a climax I turned her over onto her tummy. I squirted some lubricant on my cock and placed the head cock at her pussy hole.

I thrust into her, pushing through her hymen without much apparent resistance.

"You doing ok, honey," my sister asked.

"Yeah, I think so."

A few more thrusts and she was climaxing.

"Oh, damn, oh John. Fuck me, baby. Fuck me. Feels so ......