I am married and my DH is the father of my DC so when they were younger he bought the presents and now they are older he nags/reminds them to buy a present.
My DD was telling me about her friend whose DP (and father of their child) doesn't do mother day and for some reason it made think of families where mum and dad have split up
If you have split with their dad but now live with a DP who takes responsibility for Mothers Day?