Cheating

I found some messages between my fiancé and his coworker. Ik it’s wrong to snoop but I was clearing notifications on a phone we keep as a spare/home phone and saw he had a notification that she poked him and well it got me curious.

I am a stay at home mom of a 13 month old and 20 weeks pregnant with baby #2. Not to mention we are supposed to get married in just over a month. Do you consider any of this cheating or am I just over reacting.

Side note: he had the messages hidden in ghost mode. I did tell him I found them and he’s been avoiding eye contact and even talking to me besides the kids.

Side side note: he’s the one who doesn’t want me to work. So he doesn’t have to pay for child care.