Yeah, for some reason, the second flag was changed (it was at 0 instead of 1) until after I did the bathroom event (got 1 arousal and 2 love stats as well).
After that, I see the same two hints... "She takes her bath in the evening" and "She usually watches some TV after taking her evening bath".
So the first thing to do would be to watch TV with her at 21:00. (gained 1 arousal, 2 love stats).
Then after that is when I see the single hint, "Maybe I can join her when she's taking her bath". That is the hint you should be seeing now. You should also be facing the dining room/stairs with the day and time as "Tuesday 22:30".
I did get those stat updates after the event as well before the freeze. I guess the real question now is WHY is there a duplicate flag happening there and why is it being changed when no actions are being taken beyond time skips.
I played through the next event (sharing the bath) and so far no freeze, I'll keep beelining her path and see if anything else pops up.
One separate thing to note, any time I load up a save it never places me in the location in the picture--it always starts me in my bedroom regardless. I also did just realize I never tried any of the other links on the front page to see if I got the same results. Theoretically they should all be the same, I know, but sometimes shit happens. If I get stuck again I'll give that a try just for the hell of it.
EDIT: Almost immediately after posting I ran into another "freeze". The MC is trying to approach the mother throughout the day after the awkward bath scene and decides to sleep naked since she "can't resist". During that scene the mother walks past without stopping to look and the MC is monologuing again. The freeze happens at "(My plan! Of course!)", which I assume is when the flag is supposed to be changed for the next event in the series.
This time I'm going to include two save files. The first will be me loading your save and then immediately saving it again in a separate file to see if something is being changed just from loading it. The second will be just before going to bed for the night when the MC should sleep naked with the door open to entice the mother.
In the meantime I'm going to download from one of the other links in the OP, load from your save and see if that changes anything.