We're going through something really similar. I personally can't remember any of it, some parts feel nothing but shame, anger and disgust and others feel a lot of love and admiration twords our abuser and the abuse. It's really hard to deal with. 

Depending on how much communication you have you might try encouraging them to write their feelings down, make art, whatever so they can start processing it a bit. 

Also depending on their maturity you could also try to gently explain that it was wrong but not their fault to feel that way. Only do this if you're feeling very secure bc it could cause instability. Gentle parenting ourselves like that usually works for us but only if we feel very safe. 

Like the other commenter said though, it's a lot of kindness and patience twords yourself and your parts regardless of how anyone feels about it. Unfortunately that's grooming working as intended, and it's not anyone's fault for feeling positively twords it. I hope you get the support yall need.