Keep an open mind & have a reasonable grown up discussion that does not include accusations & anger. Good luck. .
You are supposeD to stop going through her phone.
Dump her. If she's cheating on you now she'll continue to do it after you're married.
SO, let me get this right: She now has to get her call pre-approved...by you? You don't own her! MY girl can do say talk to whomever whenever were ever she wants. She is her own person.
so if you went through her and phone and didn't find anything, that would make you a...
Communicate with her.
If you've talked to her already, I'm not sure what you're asking in your initial question.
why are u checking her phone? just talk to her...but if you have to check her phone to see if she's doing something...why are u marrying her??
Start talking to the other man, maybe you can take him away from her :)