My fiance is flying out to be with me, until we move into our new apartment together. She wants to have a drink with a guy friend of hers, and alone. She is often very flirty with him, she's told me she thinks he's attractive but she says she would never sleep with him, because she considers him "Like a brother". Should I be worried about this? I trust her 100%, but I don't trust alcohol or any male under the influence, given there is a flirty relationship intact.