Mischievous Girl!

According with that situation, there is a girl who has a boyfriend, but she doesn’t care about him (she might have open relationship). She invited to his friend’s boyfriend to go out, and he likes her. He asked about her relation with her boyfriend, and she told him about her relation is not important. He is worried about that.

What should he do?

In my opinion, he should enjoy with her and doesn’t care about her boyfriend. If he really likes her to do it, but if she wants to have a short relation; he’d better play her games one night or one romance and he’s going to feel good. He has to understand, what are her conditions? He has to understand and to talk about that.