My partner is a manager n has a young girl who works in his office (she's 20, hot, he's 31). He'd given his phone to our toddler to watch a video earlier and he was napping, I took the phone off her to turn it off n play with her but something in me told me to look through his messages quickly whilst his phone was unlocked, idk why, not something I do but it was a gut feeling I suddenly had! I saw messages he'd sent to this girl he works with at 8pm one night few weeks back asking 'what you up to tonight x' and then carrying on the convo with her when she said about her takeaway 'sounds like my perfect night x' and all this shit, then says to her 'where was my invite for food?' She's like 'with the postman' etc. That was all there was on messages n then I stopped looking as it made me feel sick. Idk what to do. I feel like I want to explore his phone more now but I don't know his passcode, as scared if I confront him he could then lie n delete stuff couldn't he. I thought I trusted him but clearly I don't. Am I over-reacting here? If my manager text me at 8 on an evening asking what I was doing with kisses etc I'd think he was being flirty. It's inappropriate n I feel like a mug.