Daily use a replica of your cock as an ass plug.

"Fuck baby. For four, since my ass will be cleaned everyday when I get home, you should stick a replica of my cock in my ass as an ass plug. Taking it out only for sleep, bathroom breaks and when you want to."

"AAAHH FFUUUUCCKKK YYEEESSSS BABY. MY BIG FUCKING MANLY MAN WANTS HIS MISTRESS' BOYPUSSY ALL FILLEEDD BY HIS MITRESS' BITCHBREAKER.... AAAHHHH FFUUUUCCCKKKK YESSSS!" She screamed while cumming again.

After a few minutes of recovery, while she was hugging and cuddling with you with your dick still solidly lodged inside her cunt, she weakly tells you, "Yes! That will be labour number four. It is so fucking hot and sexy and so dirty Sarah. God, I love that so much about you. Add it in Sarah. Then tell me the next labour you want to do."