Family that can't mind their own business!!! Help!

Ever since we announced our pregnancy with our second child, I've had family members be on our case about how I shouldn't be the one working full time and that my husband should be the provider for our family ( he works part time on weekends) He loves being a stay at home dad and I love my job! I don't want it to change even after our second is born. I'm just not sure how to go about telling them to mind their own business and to just be happy for us.