I'm going to be the man in the middle of mil drama
Do you think you can give me some details on your mother-in-law drama?
She ignored me and I told her about it in a very nice way
It's understandable that you would feel offended by your mother-in-law ignoring you. You should stand up for how you feel about her actions, and it is good that you did so in such a civil way.
I know that my MIL might get mad at me and make me pay.
Family drama can be exhausting, but all you can do is continue to handle it in a mature manner. It's important to be civil, yet firm, in such situations. Hopefully she won't resort to be being petty, but it's important that you be the bigger person.