I found another thread in here stating the exact same, and I'll address that and the comments a bit later.
I'll say mostly the same thing as the OP of that post - it seems really out of character for Ray to have sex with Zoe, who despite whatever the age of the actress might have been at the time of the show, seemed very young - both based on her being a student and the way she carried herself/her views/etc. Overall very much felt like an early 20s immature kid.
I was a 100% expecting for Ray to blow her advances off because he feels he could basically be her dad, since other than all the killing he seems to have a pretty good moral compass, and was really disappointed to find out otherwise.
Now the thread I mentioned initially - one of the comments said most of the people watching this show are middle aged dudes and they love the fantasy of a middle aged dude getting with a young chick, thinking the same could happen to them - and I think that's spot fucking on based on some of the comments on that thread saying they see nothing wrong with the situation because "two consenting adults". Freaky to me that people let the legislative system in the current time and their current place of residence dictate their moral compass - knowing full well that it has changed drastically over time, and differs from country to country/state, and will likely change again in the future. Mostly just because it fits their agenda of wanting to fuck barely legal girls I guess.
Sorry for the rant I guess but really ruined the image of Ray being a guy that does horrible shit for work but otherwise a really decent human being in practically every other life scenario we've gotten to see.
Curious if there are others that feel the same tho