Pornography and marriage

My husband and I have been married for 4 years now and I just had our 3rd child. When it comes to our sex life I always try to keep it a priority and even when I am mentally tired I still make myself available for my husband. I know he has needs too and VERY RARELY do I tell him no. I feel our sex life is healthy (2-3 times a week, not as often as it has been in the past but our daughter is almost 3 months old). Before we were married we both talked about porn and what we felt was wrong about watching it and or lusting at others. I can honestly sit here and say I do not look at men in a sexual way and I know my husband as a man his eyes may wander and I understand that… but I just recently found out he is specifically watching videos of naked women on his Facebook, Snapchat, and likely online now. I have dealt with ppd in the past with my 2nd child. I felt very alone and had found out he was doing this then. When confronted he had apologized and had stopped. I honestly didn’t know he was viewing these things again… I feel very insecure right now and have not lost the baby weight… he constantly wants sex and I do it more for him than myself right now and to find out he’s looking at this stuff again it has absolutely crushed me. I have been in my head about it for the last 3 days praying to God to show me how to confront him. We’ve had sex once since it has happened and the entire time I think to myself is he even thinking about me during this intimate moment. If anyone is curious how I found out. It was the other evening when I sat down beside him on the couch he was scrolling through videos on Facebook and he swiped out fast. I then questioned him and he had said it was just some food videos. Then I asked him to get back on and it was a video of a woman fingering herself. He acted dumb and said he doesn’t know why it popped up. Then later I looked into his account and there are TONS of videos on both his Facebook and Snapchat. Daily and it started literally 2 days after I delivered our daughter… if anyone has advice on how to go about this… I respect my husband especially when it comes to dressing appropriately as well (no leggings, now v necks, always baggy clothes in public) I just feel completely at a loss right now and so disrespected…