The bet is simple and filthy and she proposes it with her chin up: loser takes whatever the winner decides.

You win. She does not argue, because she is not a cheat, only a bully.

IsoldeGo on then. Get it over with.

You back her against the wall and open her robe instead, and she goes scarlet to the collarbone and does not stop you.

She is furious the entire time and she comes harder for it, and afterwards she says, straightening her pin: nobody hears about this.