Sounds like you are staying strong in your commitment to yourself about conversing with your H... you should be really proud of yourself!!!!
Hugs, W2G
PS.. I used to REALLY let my MIL get to me.. and I had VERY good reasons for being po'd at her... but I try not to let her get to me anymore. It sounds like your MIL overstepped the line in my opinion... so I'm glad you vented here. Are you going to ask her to forward on the paperwork/information on to you?