Mark let out a loud moan of his own, as my pussy contracting around his cock sent him over the edge and he, once again, began painting the inside of his big sister's pussy with his hot sticky cum. I whimpered into my brother's hand as the last of the orgasm flowed through me and, had he not shifted his hand from my clit to grab me around my hips, I would have fallen in the shower.

"Oh damn." I whispered, leaning back into his wet body. "I think I could go back to sleep."

"We got time." Mark whispered then, kissing me gently on the neck, said; "Sis I...