Princess Really? Even if he was a violent rapist who pushed your Mother down the stairs?
I've been in a similar position only with my Mother, not my Father, she is an enabler to men like this and abusive in her own ways as well. The only times she got to see me have been damaging. She pleaded her "I've learned blah blah". Consequences of that were her trying to kidnap me with her paedophile bf at age 3 and her partner "playing doctor" with me, at my Fathers funeral...
Her later attempt to see me at age 12 when I demanded I wanted to see her had social services step in, her partner (a different person) at that point is now in prison for murdering someone who I sat with while with them, the guy that was murdered was 7 years older than me, chopped up and hid under my Mothers floor boards. (If anyone thinks I am making this shit up then I will happily link them to the newspaper articles).
Some relationships are not worth giving a chance, for the safety of those who should be considered first.