Dated this girl for 8 months, I also took her virginity. I've recently found out that during a vacation she shared a bed with another guy (her classmate, who was in a LTR). She swears that they only slept and did nothing sexual, nor touched. I said fuck that and dumped her.

She says that she will pour a beverage on him to prove her loyalty and to make it clear that she has changed. I told her to do it, and now she's getting cold feet.

The sex is good so I planned on plating her anyway. On one hand, revenge doesn't solve anything, and I don't want to be liable for damages. On the other hand, it would make my day seeing her do this. I also think that if I back off, and say: 'you don't have to do that anymore' I'll be losing frame when I had agreed to it a week ago.

TRP is amoral I so would like to avoid the moral talk on whether it is ethical to make her harm someone else.