The third act start will have 21 big bellies around (at the player's choice), and 22 ladies in a harem that will already be public. You know 21 of them, and 20 are around.
Well, or only a monogamous relationship with your Aunt or your Mother in
Vidal the king of Pervert's case

.
In any case, besides a monogamous relationship with a non-family member or the celibacy route,
her starting relationship points will take a hit. The MC (and the girls) should convince her that a different kind of family not necessarily is a bad kind.
Some of the new girls, not only Christine, will have that hit on her starting RP.
Patricia will have some bonus depending on if the MC is with certain girls.
Kalyani will have a bonus if a specific girl is in the harem and a penalty if she isn't.
Zoe, Nia, and Hailey will be neutral.