My DH "forgot" to do anything for my first mother's day, when DS was 6 months old, and I was hurt.
As I have said on other threads, I think that until children are old enough to sort Mother's Day cards for themselves, they should be helped to make one, or scribble in one that the DH/DP has bought.
I see Mother's Day as much as an opportunity for men to just take stock and say "thank you" to the women who are the mother of their children for all those women do for the children.
Having said that, there's no way I would have sent cards, flowers and chocs to another woman. Agree this is way too much interfering. My son's godmother said to me she nearly sent me a card on my first mother's day, but felt that it was my DH's job and she's right - it was. A shame he didn't see it that way, but he's been put straight.
It's not just a commercialised thing for some people. It's actually a recognised festival in the church we belong to, so it's only right that it is acknowledged.
Come on, how hard is it to get a child to scribble on a piece of paper, fold the paper in half and write "Happy Mother's Day" on it? But I think it's a gesture that can mean a lot.