Most behaviors can be changed, unfortunately, in your mothers case highly doubtful mainly because of her inability to express regret, guild, or asking forgivness.

Also, these kinds of maladaptive behaviors worsen over time. If it were me, go for tea and overnight or even two nights. Test the waters, by the end of a couple of days you'll have a good idea of where this situation stands,

I have a sneaking feeling you'll want to come back fairly soon. Don't subject yourself to her obvious acute/chronic negativity. It's hard on your own mental health.