Advice please!!

Ashley
Ok so I posted about my boyfriend a few days ago but now I have a different question.  I put a lock on my phone bc I let my one year old pretend like she's talking on it or usually I wouldn't have a lock. Well today I seen my boyfriend has recently put a lock on his phone. I'm worried bc it wasn't 2 weeks ago he was talking to his ex and other women as friends. He deleted them but now idk what to think.