Supposed you are married for 2 years and your husband always runs and tell his mother every single thing that you guys fight about. Does she have any right to know any of this? Shouldn't the husband be protecting his wife and not saying anything at all. Please keep in mind that the MIL (mother in law) is so nosey that she has to know about every single thing including when was the last time you did it.
i had the same problem. my MIL is so influential and everytime we had a fight she had to knew it and she would pretend to be on my side in front of me and than backstab me in front of my husband me.
than before i sharing anything with my husband, i used to ask him if his mum has to know or not.
now things are better.