All you have to do is, ask her where she's going the night she goes out with the "ladies" and just so happen to swing by with some of your friends to stop by and say hi, if you don't believe her!!
(Only fair is she can look at your phone and you can't look at hers!!) An ex-girlfriend tried doing that to me and I put an end to that right quick. Told her, if she looks at my phone again, I'm looking at hers and if she didn't like it, she's "outta here!!!" lol
