Feeling insecure

Okay so I know that my fiancé watches porn and he doesn’t know that I know. And every time I ask him about what he does while I’m at work, I mention porn and he says “I would never do that, you’re so hot. Why would I need porn?” And I’m kinda over it now because he watches it often and I am mostly pissed because he lies straight to my face and he even cried a little bit when it was brought up the last time. If he can lie to me about something small, what else would he lie to me about???