My sister's orgasm went on and on, slow to subside. But when it finally did, her pussy started to relax, and I was able to force myself deeper inside of her. And the deeper I was able to fuck her, the harder and faster I was also able to go.
Bristol gripped my arms tightly again, as I rammed into her harder and harder, and her second orgasm rose up, crashing over her athletic young body, as her pussy clamped down around my thrusting cock and she screamed louder as she came harder, lasting even longer.
She came more often then any other girl I'd ever fucked, cumming nearly constantly as I lasted twenty-five minutes.
Finally crying out, I started pumping rope after rope of incestuous jizz deep inside my sister. Bristol gasped and whimpered and sobbed, as I moaned and groaned, my head thrashing from side-to-side.
I spurt into Bristol twelve, thirteen times, both of us sweaty, gasping for breath, as I rolled her on top of me, my cock still hard inside of my sister.