There's been lots of posts about this very type of thing happening and the hurt that comes with it. _:-(_ Sorry it happened to you. Some people just don't get it, do they?!! The least she could have done was thank you for the thought.
Add her to your "will not make a quilt for" list. Wait for the baby to get older and make a really fun, colorful, quilt then. In this case, the kid will probably have better sense than the mother!