'Master is pleased' (Her anal experience turns you on).

"Master loves the thought of claiming Fucktoy's ass, especially since she seems to be so experienced." You start licking her ass, moving inwards to her anus. "Has she been letting her friends cum in it like a good slut?" you ask as you press your tongue deep into her, glad you no longer have to hide your rimming fetish.

Karen jerks her ass, rocking and clenching it, trying to fuck and grip your tongue. "I offered my ass to every boy I fucked, and girl. Master's cock is really thick and it's been a while since Fucktoy's done anal. She wanted to train her ass before offering it to Master as a surprise." You withdraw your tongue and kiss her hole, delirious with joy that you get to openly make out with her ass.