How do I decline a baby shower invitation?
Just rsvp as indicated on the invitation that you can’t make it. It’s pretty silly to schedule a baby shower on Valentine’s Day, anyway. You should send a nice card to the mother-to-be or, if you want to, send a gift, but you are in no way required to. If you want to get a gift (and there are a lot of small things that are useful for new parents) I would send it to or drop it off with the hostess so the mother can get it the day of her shower.