Going into Audrey's pucker Your Own Shrinkray Adventure chapter 11 by dellobenedetto

You decided to squirm deeper between Audrey's enormous asscheeks—if this, the outermost layer, was so soft and delightful, who knows how luxurious the innermost part of the trench is, let alone the parts past her pucker! Thankfully, it was easy for you to make progress, as when the tightness of the booty proved too much, the bimbo's stride did it for you. Before long, you reached Audrey's tight pucker, just loose enough that you could start squirming through...

...And, you immediately regretted it. You immediately collided with something oddly squishy. There was only one thing you could think of that could be in this part of her body that felt like that, and it grossed you out knowing you encountered it so soon—especially as you beheld the brown color when your eyes adjusted. It didn't help that the smell of the mass was... hey, wait a minute!
Taking a risky bite to ensure you weren't crazy, you learned that Audrey's poop didn't just have the look, feel, consistency, and smell of a fresh-baked fudge brownie, but the taste of one, too. You were utterly dumbstruck, before figuring that the genie must have done that for you out of expectation you would end up in the ass of one of your harem girls sooner or later. Well, best take this good turn; you gobbled a ton more brownie, clearing out a space to relax.

You heard Audrey smack her ass, her giggles muffled from her own body. ^{"Eeheehee! That felt so good feeling you climb in there, master! Maybe I'll have one of your futas give you some company in there, eehee~"}
You felt your cheeks redden, and told her that you'd prefer she wait until you confirmed you wanted it. ^{"Alright, master. Enjoy the ride, then~!"}
And with that, Audrey continued walking around and chatting with everyone in the harem, her conversation still muffled by her own body. The most prominent noises were her moans of delight as you massaged the inner ass flesh you sat on, intercut with you taking bites of delicious brownie. Perhaps you could stay inside her booty...