Re: Another MIL post..WWYD?
I don't think that returning a gift should have to cost you $$.
You could send a thank you note from your baby, then dont initiate any more communication with her/ignore her attempts involve you in any drama. If a gift receipt was included you could return the gift & mail her the money you got back. Many retailers offer a card for store credit if you don't have a receipt & you could mail that back to her if you find a retailer that carries the item you were gifted.
But, if the gift was sent anonymously the sender should not expect a thank you.