I don’t think it’s unreasonable to want to avoid your MIL. I also think it’s reasonable for your wife to maintain the relationship.
Can you use her visit as excuse to take a vacation—alone or with friends—or visit your family? Given the circumstances, I think avoidance is a perfectly valid option. Get some you time if your wife is cool with it.
FYI, most Mullvad exit nodes are blocked by big services.
You have to try different ones to find one that works. I have found just a couple that work for, for example, Netflix or Reddit.
Proton and PIA seemed to be easier, I think they have more exits and/or rotate the IP addresses of the exits.
I like Mullvad as a company better so I use them.
Streamed pirated games and ignored the lawsuit. Made stupid threats “I own the streets”.
Not feeling sorry for this guy.