Still no...

You stop encouraging your milk glands and they soon stop filling your mouths with fluid. Your round middles had almost gotten large enough to push your lips apart anyways.
"So, ready to talk?" You look down in triumph at her swollen body.
"I'm not even completely round yet, and you think you've got me?" Kako laughs. She does seem a bit nervous, however, due to her middle being quite large already.
You stand up over her. You can feel your butt is larger than before. So, you turn around and plop your ass down on her protruding belly. As expected, your slippery butt cheeks slide off to either side and you relax your hole so it begins to envelop Kako's big round belly. You make rapid progress to a point, at which it slows when you need to allow yourself to stretch to continue. You reach behind you and grab Kako's breasts which are hanging off of her sides and guide them to the center of her chest against her belly. You scoot back in order to stretch yourself lengthwise along your crack and raise up slightly to position yourself for them to enter you. The nipples start the process as you lower yourself on your journey downwards. She helps you by holding her breasts in place just under the areolas. You can feel the two large mammeries inching inside of you...though it's more expansion than depth; the dimensions you have taken to this point and the way she is gripping her breasts **** you to widen at a point where there was not much to work with at the start. She of course neglects to move her hands when they are about to enter you. Feeling tighter than ever, you are sensitive to every inch of your asshole as it envelops Kako; her round middle almost all of the way around, and then two growing areas of roundness at the top of your hole.
"I've got you now," Kako says seductively, "you like inflatable things to stick up your butt. I'm happy to say I'm just what you crave! You still have a lot to go, you aren't gonna give up now...are you?"