I wouldn't feel right asking anyone to give us a shower either. I think that would be tacky. Plus I would only want someone to do this for us if it was coming from their heart not because we asked.
The open house is the way to go if no one has offered a shower as your way of celebrating the joy of your child with friends and family. YOU show THEM how special and important your child is to you
Let us know how it goes!
God Bless,
Judy