I think it was just a misunderstanding. I'm sure it will be used quite a bit. I know it hurts to not get a thank you, but I'm sure she went inside later, looked at it and thinks it is just a great quilt for baby.
I have given many quilts and have gotten ... it's pretty and then the quilt is tossed to the side. Others weren't even looked at when they were received, but later on, have gotten thank yous for them.