Dh's sister has 2 boys, similar ages to our girls. I have always found it extremely difficult to have a relationship or even talk to them much.
The reason...? My own sister had ovarian cancer many years ago and was close to death. She survived but is still mentally and physically scarred. She is now in her 50s, single (more or less) and childless.
There's a big age gap between us and when I was little we often talked about me becoming an auntie when she had children. I just feel so sad that it never happened and terribly sad for my sister. I know it's illogical and wrong but I can't help feeling that I am an auntie now (albeit by marriage) but not in the way I wanted to be.
I feel terribly guilty and I know it's not the boys' (or anyone else's) fault...I just can't help the way that I feel.