Consider the situation.

You extract your penis from Kako and look down at yourself.
With your big fat tits, you are everyone's wet dream. Women will want to play with them out of curiosity and compare them with their own, and men will want to fuck them and cum on them. You can produce enough milk to feed an orgy. Your thick legs and wide bubblebutt invite all comers to ram your ass with strapons and dicks of all sizes. Double penetration and fisting are necessary with an ass this big. Your cum-filled belly juts up between your breasts and under your chin, and sticks out so far that everyone will want to touch it. Your own normal dick is accompanied by a ball sac which is also filled with Kako's cum. It takes you and Kako together to move it. Kako's own belly is filled to a fraction of your size by your milk. It makes things interesting.
You are currently carrying your sac to the couch. You lean over the arm and put the whole thing there.
"Nice cleavage!" Kako is watching you as you lean over the arm.
"Even with this fat gut hanging out?" You poke at it.
"Here." Kako comes over the couch and that means over your sac. "I'll push down here. You push your rack together." You do as she says, and you poke out of the bottom of your top a bit, but your belly is no longer under your chin.
"I bet you want a reward? Some tittyfucking?" She gets her dick in between your tits in no time. Due to her size, there is not much in your cleavage when the head pokes your chest.
"It's longer than it is deep," you mention.
"Oh, right! I'll go in the top." Kako gets up and turns around. Then she backs up and does a handstand! Her legs go over your shoulders and her cock disappears fully into your deep cleavage. You feel it poke the top of your belly. She raises and lowers herself so that her cock fucks your tits from this angle. Her large sac rests atop your head. One testicle hangs to either side. Her ass crack grinds up and down your face. You stick out your tongue to moisten it. You feel her cheeks twitch in response.
"I bet someone would like her ass licked, too," you mutter into the bubblebutt as you reach to spread it. You lick up her crack and also lap at her hole when it comes within range.
"You...oh...lubing me up...ugh...honey?" Kako says in between moans.
"It depends, do you want all of this cum back yet?" You smack her ass.
"Oh...I can't...so full..." she responds.