Partner watching porn

Bit of a random one but defs related to the post baby relationship strain so I wanted to come here for some advice. Since having a baby our sex life has completely died- I know that's quite normal but my sex drive has returned and I have voiced this to my partner but he is never interested as he says he's always too exhausted. However I'm aware he has a porn habit that I can't help but feel really hurt by. It feels like an emotional betrayal, especially given he isn't currently up for having sex with me. However, I don't know if I'm overreacting. Is occasional porn use just something that we should be prepared to tolerate in a sort of 'boys will be boys' way 🙄 Keen to know how other women deal with this in their relationships. My partner is going to through quite a tough time ATM so the last thing I want to do is start a row but I can't help how down it is making me feel.