Nice: Allow her to use your ass...

"You are such a chore, Kako," you tell her as you get up from worshipping that monster dick, and turn around. Much to her delight, you hike up your skirt in the back to reveal your silky red panties. After bunching the skirt around your waist, you hook your thumbs into the waistband of your panties and pull it down slowly. You turn your head to see Kako's mouth watering as she looks on. You tuck the waistband under the bulge of your big butt. You spread your ass for her as an invitation.
"I promise I will try harder," Kako says as she gets up behind you quickly and has her oozing head at your hole. With practiced skill on both ends, her dick is traveling up your bottom in seconds. You both sigh with the familiar feelings. Without any need to hold your ass open any longer, you move your hands down to feel her length entering you. What a length it is! When she is all the way in, you feel her start fucking you. She fucks you with slow, hard, determined thrusts. You get the timing down quickly and make sure your ass is moving back to meet her forward motion. You feel her cock thicken at your hole as her cum flows down the length in preparation of her orgasm. She does not miss a beat as you feel the hot liquid surging into you. You worry as your belly grows; you don't want to pop the buttons off of your new shirt! Just as you are about to open the buttons you realize the shirt is stretching with your growth.
"You like that? I knew you would," Kako tells you as her orgasm subsides. She keeps on plowing you as she talks. "Pretty sure these things will hold anything we throw at them. Ugh, here is some more!" Kako climaxes again quickly as she has apparantly coasted between orgasms. You brace yourself for the added weight this will bring to your front. The shirt supports your growing belly well. It stops the sagging to your belly so it grows more out than down.
"Yea, I do like this," you tell her. "It makes it look so much better!" Kako is not really listening as she is still fucking you. You know what kind of mode she is in and make sure you will stop her...well after one more load maybe. You get very horny after the second deposit and know the only thing to satisfy you is a third.
"Last one, Kako...better enjoy it!" You shake and jiggle your ass lewdly as her cock slides in and out of it. She grabs your hips for her final thrust and slides all the way in. You watch as your belly, contained by your new shirt, expands upwards now after reaching a certain size. Up it goes between your tits. Now you see the reason for parting your breasts. You fill the gap between them rather fully by the time you feel the twitching cock stop spurting. You quickly have her pull out of you. You clench your large hole so no cum escapes. Then you pull up your panties again and let your skirt fall back into place.
"You look all pregnant again," she giggles. She admires you as you turn to her.
"Well it feels and looks better than ever with this support. I like how the bra made room for my belly," you say thoughtfully.