She is one of my oldest friends and god mother to my daughter. I am godmother to all her children. I've always made sure I got a card at least there for her dc's birthdays (she has three kids) even if a little gift followed...(and even when she's not lived in this country) and she even asked me recently to remind her of the date. I remember so well when her dd was young that she used to get upset that her daughters godfather failed to send her dd a card/gift and completely forgot the day.....
My mum said to ask her if it got lost in the post (I don't want to stoop that low) but I think I just have to slowly realise that maybe this is the way she's going to be and get over it - the promise of a christening present never materialised either.....