Saw bs in my mans phone…. What would you do

So me and my guy have been together for 2 years now , mind you I just had our first baby in Oct , so this has been new for both of us still , so just a couple mins ago literally he’s getting our baby girl ready to go to his moms rq so I get on his phone (keep in mind we always get on eachother phones and we know eachother passwords etc) to see if baby girl can stay the night at his moms but it was a lil joke , so I got on his phone an went in the bedroom soon as I got on I saw she/males porno , so here he comes running !! Fast jumped on the bed with the baby and snatches the phone but I hurried up a swiped up from it an went to the bathroom to process what I just saw ! So he left to his moms but of course I had an attitude but I’m trying my best to not overreact !! But everything is just playing in my head now all the late nights Iv stayed up with baby girl in the room while he’s in the living room on the couch getting his “me time” he’s been doing that ?! While I’m rocking our baby to sleep , trying to clean etc he’s been doing that!? !!