Dealing with a jealous/controlling nmom

Myself and fiancée are getting married later this year . Fiancé has a bigger family and I’m basically my mom’s only close family and only child.

For context, she will basically blame my fiancee privately for anything I do that she disagrees with.

For example, we had my fiancés family over for dinner last week and my mom found out. Apparently it was weird for them to come to visit during the week for my fiancés birthday and now she’s made up in her mind that we are going to move to be close to my fiancées mom. This is the kind of regular shit I deal with.

Of course she also uses this to somehow bring up after 6 months that she doesn’t like our wedding venue and is trying to dictate my finances. If I call her controlling it is just her looking out for me though. Of course despite saying that I am happy with the venue and location, she has created an idea in her mind that every decision I make is the mastermind of my fiancé.

The funny thing is that in person she gets along fine with them, but she will go home and start to get paranoid and start messaging me and calling about these paranoid delusions. This is not the only issue obviously, there’s us moving too far (more than 15 minutes), spending too much money, not having kids on her timeline (I have reiterated literally dozens of times we will after marriage), not supporting her enough when we see her double the amount we do anyone else, etc.

I have considered no contact but am avoiding for multiple reasons, it will almost certainly lead to an attempt, and hundreds of calls/ showing at up at my house. I have restricted myself to a few phon calls a week but of course she has no boundaries and will try almost every day.

Anyway, just a vent. Any advice is welcome