You and her.

With your new proportional ass, you now have the balance to haul yourself from your bent over position. Your belly sloshes lazily, contained fully by your shirt; your breasts have **** it back inside as they take up the center of your chest even with that bra pulling them back. Your areolas are plainly visible as they stick out past the edge of your shirt. As you become more aroused looking at yourself, your nipples pop out too. They are really big. You figure at least 24 inches long and 4 wide. Your bra contains as much tit as it can.
"Kako, seriously?!? Look at these nipples!" She does.
"I guess those would be fun up my butt," she ponders out loud. You lift up your skirt in the back and wag your ass at her. You leave your thong-like panties up since they don't block anyhing. "I guess you need bigger panties, honey. And a bra." You smack your ass. She doesn't act.
"Kako, your dick in my ass, please. Really horny here." She seems to snap out of it and aims her dick. You back onto it until your shemale girlfriend's crotch is surrounded by your fat ass. She still seems to be thinking.