"No, that's disgusting!" you exclaim, trying to pull away from her anus. You can't seem you get away though, her butt's to thick, and you're starting to feel like you're being buried in all her soft fat.
She clamps her butt around your body, pulling you further in and closer to her hole, "Did you just say no??? I don't think that was very wise, especially considering your current position, do you? Kiss my ass NOW" She emphasizes that last bit by clenching her butt cheeks together even tighter, driving you that much further in. You begin to kiss and lick her ass, not wanting to upset her any further.
Then you realize...