Not able to do certain Romantic interactions with grim

So I play on PS4, I don’t have the new expansion pack yet, in fact the last expansion pack I bought was high school years, I’m trying to “woohoo” with grim so I can have a reaper baby (the achievement for it is what I want to get and the achievement was there before any updates or anything) but the only option to appear is the woohoo option which I CANT do. I can’t invite him to the lot, only can do it by the grammar phone but even then it won’t let me woohoo at all with him, only have a science baby with him and even then the achievement won’t unlock. IDK what to do at this point.