My thoughts are that she is either involved with OM and is planning to meet him, or else she wants to get away from you is why she's going on a trip without you. It's entirely possible for two girls to do that, but since you are having problems....it looks a little suspicious. Don't ask her about it and see what she tells you.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!
