I was pregnant with my first during Mother's Day. DH tried saying I wasn't a Mom yet, but my sisters were smart enough to tell him to at least get me one of those expecting mom's Mother's Day cards. And we went to brunch.
Get her a "mommy" card from the kids at least! SHEESH!!!
Or have the kids make a card for Mom. I am sure she will appreciate that even more.
Personally DH is not my kid so I don't expect or want anything from him. As far as the kids I keep saying I want them to clean their rooms and that can be my present. For some reason they keep laughing when I say it.