MIL buying my child gifts I mentioned getting

It would piss me off tbh- definitely say something to your husband if you don’t feel like you can to your mil.

I would bring it up to your husband. I don't think you should approach it with her directly.
See how he feels about it and maybe for this time you can agree to let it slide but just say it would be good if this wasn't a recurring thing.

Honestly I get how you feel. My mother in law is a nightmare. We have had to have 3 conversations with her to stop buying our unborn baby things without asking first. She was buying things that I felt are a personal thing, like breast pump! X

It was on purpose. Let your husband know. However your best bet is withdrawing yourself a bit from the relationship and sharing less. I used to share quite a bit with my MIL but at some point she'd say some stuff i didn't like despite me asking her not to. And i wouldn't argue with her like I would my mum cos it's very easy to sever the MIL/DIL relationship cos there's already a sigma associated with it. I decided to just remain cordial and share less like a friend (although we still maintain a good relationship)

Don’t tell her what you getting 😂 and speak to your husband about it coz she needs to be put in her place plain and simple