Is he cheating?

H

So my bf (we got 2 kids under 3) has been having problems cumin for a while now...it started w/my 2nd pregnancy (baby is now 9mo) where he’s like..I don’t want to hurt the baby (hence he had no such worries with our 1st...lol). He started sleeping in the guest room almost 2yrs ago bc he had to go to work ... anyway I was almost always the one initiating sex so he wouldn’t stray.. Now when we sporadically do it (1ce 2ce/mo) he cannot cum... I cum. We’re 37-him 39-I ... is he cheating? I’ve snooped on his phone but other than porn haven’t found anything.. Before the 2nd baby sex wasn’t as hot as before we had babies but now is like ..nonexistent..he’s like we’re old baby I work too hard I got anxiousness (he’s in real estate ).. help!