Do you want to stop her going? I'd say let her seize the oppourtunity. Ultimately it doesn't matter if it's a trust issue or what, if she wants to go you should let her and be happy for her, because if she's going to play away or anything there's nothing you can do about it. It's 2013, nobody asks permission concerning women any more, as that's a sexist practice that can f**k right off IMO. to be honest I'd put money on him trying to dick her, but it doesn't really matter if he is. She'll either say no, in which case she's a decent lass, or she'll say yes, in which case he's doing you a favour. It's OK to not be happy about it though, I wouldn't be. Just make sure to pretend you are though IMO.