Hubby messing about again?

If my husband cheated on me before is he likely to do it again? I caught him chatting dirty when I just gave birth to my daughter and he never shows me his phone yet his snap score increases every single day and the way he acts so vain like I said who you trying to impress? He goes I'm going gym and dressing up for myself when in reality he is the most laziest person ever..he never shows me his phone cuz he said I'm too paranoid and when I can learn to trust him he will show me the phone is that just an excuse? He has a password and I can't unlock the phone so am stuck