Checked in on this for the first time in a year or two and there's not been a
lot of progress, but several character paths now have some minor branching in addition to the initial three Felix/Chloe branches and the Alicia/Alex choice that's been in there for a while. Very few of those branches lead anywhere for now though.
Winter's still a bit of an oddball in that her day-to-day interactions have sub and dom variants, but all of her story events are written with the MC as submissive (paddling, pegging, etc.). There are a few such oddities here and there that could do with a consistency clean-up.
So you can fuck the Dad too?
Or more Cucking the Dad??
If both parents' relationship values are high they and the MC will form a sort of throuple with banging in all directions (M/M, M/F, M/F/M). If the MC maxes out their relationship with their Mum while having a low relationship with their Dad, it'll be a cucking scenario instead.
Dunno if you can do the opposite (low-rel Mum high-rel Dad) as well; not my thing so haven't checked.