Hi Irish, Just keep encouraging your daughters to talk about their feelings etc. And more than likely they will be fine. And what a great dad they have got in you!
I hope the things you have blocked out for now, you will someday be able to process & internalize the events in there true light.
And not like me (when I was very young) or my youngest D. Her Sitting on our sofa (Mon 26th Jan 04 when she came home from school) "It's not right, it's not right, I'm only 13" My youngest can't remember saying this. And for about a period of about 18 months or so from early summer 05 till spring 07. I had a very testing time with her to say the least. But she came thru it with just a few scars, and her & her sister's can always talk to me about anything.