Hi Natalie, I was just talking about this topic & had referred back to my book "Reinventing Your Life; How to Break Free From Lifetraps" by Dr. Jeffrey Young. (he practices "cognitive therapy" in NY but has counselors in NJ call ###-###-####)
Cognitive (how we think) combines different types of therapy (behavior,etc); helps us change the way we think (&behave) about things.
Coming from divorced parents myself, who argued allot prior & after years of various types of therapy; I can offer first hand advice. This book has helped me allot; I only wish I'd read it sooner.
What happens is no matter how much you THINK you're doing right-- none-the-less the child KNOWS Daddys gone, period. They may experience feelings of "abandonment" that, if not treated properly, creates "lifetraps" (or schemas) that can carry over into their adult life; affecting choices in a partner or friends, jobs etc. No matter how much we TRY or THINK we're hiding our feelings, children can sense our sadness. If she hears you talking about your problems,crying, etc. she may feel 'emotionally' abandonded by YOU too; fearing if Daddy can leave, why not Mommy too. If there was allot of fighting? some children experience feelings of their family being unstable (stability crucial to healthy child development). Some children either cling (follow the remaining parent around)others react differently--become autonomous (more isolated;take care of themself). This is a traumatic time in her life & how you handle this NOW will make all the difference. I am 47; recently my Dads wife, upon hearing the sudden & tragic death of my Mom (last May)basically said she felt "relieved" & let me & my 3-sisters know. When we became obvioulsy upset (+Dad never came to the funeral) w/her reaction - she got angry & now isn't speaking to some of my sisters; told us we just don't understand all my Mom put THEM(her/Dad) thru! Tho I said I sympathized, I said it's not what "they" went thru it's what "we" all went thru & that I felt it was harder for us bcause as children we had 0-choices while adults did. Again, she said I was wrong, that it was the ADULTS who had it harder & 0-choices. Meanwhile growing up my sister tried to commit suicide, 3-quit high school & ran away, etc. SO as you can see -- this is why I still, at 47, after many troubled relationships, still not married & no children, struggle with my parents divorce. When the adults so obvioulsy don't know how to REACT or HANDLE the situation; expect children to "get thru" or "over it" ..or the worst when I hear "children are resiliant" they'll "bounce back". The end result of THAT line of thinking? (which I can see you don't have thank God) is.. well .. ME! Best of luck to you. Hope this helped.