Not sure what/why you would want to do/deal with this?
Your very strained relationship seems to have been based on you keeping your mouth closed whilst a tone deaf, insensitive and bombastic person sounds off about any subject she chooses, with no respect for the feelings or opinions of others. Bet you'd never have tolerated this for years if this was a 'friend'. Family often believe they are untouchable!
I'd do absolutely nothing. If she reappears, you have a chance to lay down some new ground rules before she assumed that everything can be put right between you. If she doesn't - well there must be so many people you'd rather spend time with. Life may be too short to quarrel, but it's certainly too short to waste on those who don't value you and your feelings.
I can't believe my car insurance has risen by that much!