I'm sorry things are strained between you now. Hopefully with time things will improve. You don't know what her Mother might have said about your support or lack there of. The truth is that without prompting from Mom many 18 year olds would miss Father's Day and birthdays. Not saying that it is right just that I understand how hurt you are but hope you can look beyond it.

I do hope that you picked a nice but appropriate gift and sent that for her birthday instead of a tatoo. Being 18 sure ain't easy.