They just don't remember and my soon to be ex didn't think about it either. I contacted them, told my husband that he needs to do a better job on letting the kids know. Then I spoke to the kids, told them that they are old enough to hear this (youngest is almost 16). They didn't send me a Christmas card, nor a thank you note for the gifts I sent them. I told them that even though I'm far away from them doesn't make me less part of the family! I hope I got it through to them and my husband!