He cums in her ass, of course.

"Damn...this hole is as tight as all your other ones," he whispers in her ear as he holds off from cumming a few more seconds, "no wonder I've always wanted you."

"Yeah...FUCK...and look at us now....SHIT...me pregnant with your kid after four days of non-stop sex..." she hissed as he bottomed out in her ass and held himself there, ready to fill her last remaining unfilled hole with his cum.

"And hopefully letting me cum in your ass, too," he teases her as he grabbed her hips and shot his load without warning.

"FUCK...warn me next time..." she hissed, feigning surprise but secretly loving it as John's warm cum filled her tight ass just as it had filled her tight pussy for four days straight.

Carrie never thought it was possible to be such a slut for one man, not even her husband, but as she looked into the eyes of the man who had rescued her, finally given her a baby of her own, and changed her world around, she knew there was only one thing left to do.