I found a bug. When Deb, Carl, and Oliva are talking to each other you have a timed choice option. The "Just leave" option has a timer, but the timer doesn't count at all, and when the conversation apparently ends, the "listen in and eavesdrop" option disappears, but then you can't progress at all, it turns into a softlock (EDIT: I re-loaded and managed to get it work. Something probably open a menu/the phone/something locked the game up, but I am not sure how to exactly reproduce what I did, but I did manage to finally find a way to progress. You might want to make all the phone/menu/skills/etc. options unavailable during timer choices)
Yes, it will be eventually included in the late game, with at least 1 girl that is into that sort of thing.
These polarising/extreme kinks won't have many scenes, but I'd still like to give them some proper representation in the game, without any kink shaming. It will be a long time until we get there though.