The aunt's... revenge? Does she think Juiqin's mom snatched that guy away from her? Even though that guy was two-timing and it was his decision to marry Jiuqin's mom.
Hah, this is indeed messed up!
Arghh her mom. Too trusting.
I would 1. and then plan for the ruin for the two bitches. For the father, if he can be humiliated would be great if not just ignore his existence and cut off bloodties.
Same with @nixnaw in answering the last question in the end.
If Su wants a paternal figure in her life her mom does just fine and the old guy could be her honorary grandfather, if not, god-grand father.
Also, Lin exposing the cousin, hah. Noice
Option 1 play the part of a good kid he can kill her at will
Option 2 goes with 1 just no need to go crazy Expose the thots
Option 3 ancient China. she has to marry out