WIBU to respond this way to a present given to DS by MIL?
Backstory - MIL is very controlling/emotionally manipulative of DH. He has gone relatively LC with her since we had our DS (he used to see her a couple of times a week, now around once a month) - his choice not mine. She is regularly putting him in deliberately difficult situations where he feels that he is being asked to choose between her and me/DS. I bite my tongue and try to be supportive but it's not easy.
DS is coming up to his first birthday. We are having a small get together to celebrate. We have been avoiding buying plastic toys for him since he was born - I dislike the environmental impact and also don't like the house to be filled with plastic crap. We do have the odd plastic bit here and there which have been handed down by friends - I have no issue with this. MIL knows this as we have explained it, but almost every time she sees DS she brings some sort of plastic tat, gradually increasing in size. Last month it was a plastic Hoover. I am already dreading what she will bring for his birthday.
I have asked DH to let her know that DS really doesn't need any more toys and to suggest a book or item of clothing, but he doesn't feel able to do so without initiating an argument. So, when she arrives with her enormous plastic toy, WIBU to thank her and say it will be great to have it to play with at her house???