I had to look it up. It was Fallout Frontier and it’s controversial because there’s all sorts of sex related shit that is really questionably presented. Like there’s a deathclaw in heat and the game supposedly goes in-depth with how much the deathclaw wants to mate with the player. There’s also some fucked up shit like one of your companions gets raped and you can comfort her with “Why are we still here? Just to suffer”.
I didn’t remember the details but I did remember the community pretty quickly going from hype to not even talking about the mod.