As Robin swallows her alive, again, Anne is getting irritated.

Not at Robin eating her, at least not exactly. This is a vore world and the purpose of women is to be food, for men, and sometimes for each other. It is a purpose Anne fully agrees with, and like most of the other girls, she is eaten by somebody almost daily, and would be ashamed to admit she ever went a week without being digested.
Of course no girl, at least no decent girl, would allow herself to be eaten too often. One must not be thought common. And one can't admit to enjoying being devoured, no matter how much one does.
Which is much of the problem. Robin had simply grabbed her and started chowing down. Not any attempt to ask if she was available, nor to ask how she wanted to be eaten. Nothing. Just all of a sudden, her head was in his mouth and he was taking her clothes off as he swallowed more of her.
Just no respect at all.
And Robin is a good friend, maybe more than that. He should know better. Being in his belly is not at all a bad thing. Certainly better than be food for some stranger. But she expects to be asked, or at least given a little warning.
Especially since she is the Wotch. She has duties, responsibilities she can hardly meet while being turned into nutrition in his stomach. She can't be playing around just because some boy has the munchies. Granted, she doesn't have any emergency at the moment, but Robin has no way to know that.
Of course, being the Wotch does make some difference. It's not at all hard to switch sex, and it seems like it is time to switch Robin's again to give him a reminder of how women like to be treated. Remind him how it feels when a boy does...oooo.... well, that too.
Perversely, the sudden joy does nothing to lighten her bad mood. He "obviously" did that just to ruin her argument. Nor does she allow his sending her over the top again to make her admit he was paying any attention to her needs.

But she is continuing to slide into his belly and presently she is curled up into a big ball of flesh, waiting to dissolve into a soup. But being the Wotch has its advantages. She can speed the whole thing up and be digested in a few minutes if she wants. There are places to go and things to do after all.
Of course it is rather nice in here. Maybe she should just stay...