Messaging another woman!

I recently saw messages that were deleted from my husband to a family friend. I called out my husband and says his friend has been using his phone.

He claims he wasn’t taking the blame for all of this and had me talk to his friend. His friend claims he’s been using my husbands phone which I find a bunch of BS. His friend said “please don’t tell my wife”! I swear to you it wasn’t your husband but don’t tell my wife.

This “other girl” was going to be traveling with us next month internationally and I feel like this needs to be addressed!

I don’t believe anyone. I’m super hurt right now! Am I wasting my talking to this girl?