@apf78 Well, what die you expect ? She got crazy and twisted after all the bullying she went threw. I don't want to deny it, it's not good that the fmc is tormenting the mc, but I understand her reason, even if it's small a small piece.
I think, since they are both in a relationship, they should talk their feelings out. That uneasy feeling they have, sticks between them and that hinders their development.