I agree with CGT and osuche. Remind yourself of who she's going to marry - you, not him. If she was doing this to cheat I doubt she'd have gone about things in this way. Have a friendly - and I emphasise friendly - chat like osuche said, and I'm sure you'll find it's nothing. You're never going to definitively know if your partner is "crossing boundaries" as you put it unless you monitor her 24/7. You just have to trust her and communicate. Good luck

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