How do you handle overbearing Grandparents?

I had my first baby, a daughter, in January and my mother in law is so very overbearing with everything. This morning I got a text of a picture of a dress she just bought with the text "Won't she look so pretty for Easter?". Yes....yes she will... but I already bought her a dress. It's her FIRST easter for crying out loud...I know her heart is in the right place but her mind isnt... sigh....