I just had my baby in October and I a

Have caught my boyfriend on multiple occasions watching porn. I feel a little disturbed as he has a whole book of nude pictures of me and on his phone he could use. We have talked multiple times on how it makes me feel. He continues to do it. We have sex every other day if not every day. Its always when I am at work at night. What could be turning him on in order for him to want to watch porn, when he tells me he is going to bed.. any advice is appreciated. I don't need the at least hez not our with other woman...yes I know that but watching porn is equal to me.. he has plenty of other things he could use that I have given him rather than watching porn.