A close friends situation got me thinking about this sort of thing...
Basically her Dad has older children from before she was born who he never sees and she has never met.
He has been married to her Mum for a long time now and she has two brothers. She says he's always been a good Dad to them but I know she finds it strange that she has siblings out there somewhere who she has no idea about.
Whenever she mentions it I just can't help but feel really sorry for his older children. How hurtful it must be to know your Dad is a good father to other children but never bothered with you.
I also wondered how I'd feel as his wife (my friends Mum). I don't think I'd be able to be with a Man who did that, would you? Would you judge a woman who was with a man who'd abandoned and never seen his children?