Would you be upset?

So my BF admitted me was talking with a girl while we were dating. Later I found out because I snooped that he had video sex with her and was masterbating on camera with her. I was shocked and pretty much have been depressed ever since. We are still together because I am a weak person and finacially cannot be on my own at this moment. I forgave him because we have a child together and honestly want things to work. Well today he wanted me to give him his phone (which is locked up tighter than you'll ever know) well I accidentally slid the screen down and here he is talking to this girl on snapchat. I don't have snapchat. I didn't know you could even talk on there. I am in a better place in my life where I could support myself but would you be upset that he STILL talks to this girl?