Your Master is opening up your virgin butt, while you’re helpless in tight bondage.
I’m driving my shaft up your butt.
I’ll open up your slave butt before I fill it with my warm seed.
As you drive home to your husband, my seed draining from your gaping butt will wet your panties.
Dry humping doggystyle grinding my bulge against your ass while I pull your hair and breathe down your neck until you're a slobbering, needy mess whining and panting and begging for the real thing like a stupid, desperate puppy.