It would make sense that the forgiveness you felt previously, is harder to find again when there is a new A... (If I got the sequence of events right.) If someone repeats their hurtful behavior, I don't know if it's possible to forgive why they are still doing it.
M 16 yrs, WH62, P54 3 adult blended kids EA 11/13, BD1 6/14 PA fall 14, BD2 2/15 Piecing 2015, BD3 12/15 Separated 4/16 WH moved OW in 5/16 Divorced 6/15/17