I just wanted to say that I think your wonderful for giving the girls some one they can talk to about this and any thing else.
I think some times people think by not talking about it it is easier when in fact that just makes it harder. At least for me.
It is easier to remember the good when you can also express the bad. To let go of the anger and sadness when you can let it out with other people.
It is so hard to talk about a loved one who commits suicide because it makes people feel awkward, but by talking about it we can lesson the darkness and remember the good.
You have a good heart and even when we have forgiven we still sometimes feel the anger come back but its ok.
Take care