You've got to be kidding is the first thought that enters your mind as your new partner in life uttered the request. You weren't even sure to begin. Then you realized that, of course, that just meant a lot of pressing up against her gigantic soft form. All objection left your mind, and your pants tightened in a way quite different from Renamon's were.
"H-how should we do this?" you ask, gazing over Renamon's form. She thinks about this for a moment, tapping the sides of her massive gut, making it wobble just slightly.
"I guess I am bigger than usual. Could you help my roll over, baby? I've got a better chance with this big ol' belly beneath me."
"S-sure thing....lemoncake." you say with a grin. Renamon laughs at you pleasingly, ripples of flesh sent down her body. You quickly get beside her and lay your hands against the side of her belly. To your surprise, you feel a sudden push back. It takes you a moment to figure it out. Renamon smiles at you.
"The children always get so rowdy after a meal. I think they're going to take after their mother, hmm?"
"Amazing...I mean, it still gets to me."
"I know honey. But let's get me moving, hmm?"
"Right." you say with a nod. Gently at first, you begin to push against her belly, letting it jiggle back before pushing again. You're rocking her, building up momentum. It's amazing to watch. First her belly, and then her breasts get in on the motion, and her bottom jiggles too as one mammoth ass cheek is nearly lifted up with each push. Her whole form is soon swaying rhythmically. You see dark eyelashes flutter, and she lets out a contented moan.
"Keep going baby....I feel so good." you don't need encourage. Each time her belly comes crashing back into you, yellow fur pressed against your arms. She does her best to get in on the action, nudging herself this way or that with a giant arm. Eventually, it happens. With one final heave she rolls right around onto her globular gut. For a second, it looks like she isn't going to make it, but then with a heavy sigh she rights herself, belly underneath and partially hanging over the end of the bed. She pants with exertion, and has to spread her arms wide to get them against the bed and around her boobs.
"Great job baby." she says. "Now we just gotta get me on my feet. Baby?" she sees you're not exactly listening. Specifically, you're paying full attention to the giant ass now pointing skyward. Excess flesh is oozing out of the top of her jeans, but it's clear her backside is under heavy constraint. And with her legs limp as they were, you could see that there's easy access elsewhere as well...