Fun so far, and I did not expect that _everyone_ gets pregnant in ch 8 :)
One tip/idea, though: You are aware of renpy's text options?
The normal styled MC name does not really fit the all caps sentence.
Using
le "I'M SO CLOSE, HARDER [y!u], HARDER!"
instead (Chapter 8.rpy, around line 2650) looks better, imo.
More style options are described in https://www.renpy.org/doc/html/text.html#interpolating-data
Thanks for your game, looking forward to see the story unfold!