My friend and I have made out in the past. Yesterday she told me that she is looking for a female partner to surprise her bf on his bday to watch her make out with a girl. She also asked me if I was interested?

She basically said dinner would be paid and so would cute lingerie and that I can watch them have sex after or leave . Lol idk if I'd like her man to watch me make out with his girl... the situation is just weird to me lol.

What would you do?