Bonpen - you are not alone. I empathise. I have an AD, who can be very difficult. Her last ‘sulk’ was because I did not show enough enthusiasm for her new job. She is the eldest of 3 and has issues with everyone except her youngest brother, I’m sure you’re not the only mother who has issues with her daughter - mothers and daughters !!
Unfortunately, you just have to placate her, rather than have a major fallout. I am a few years younger than you, but I feel I can’t deal with confrontation any more. When I sense that something’s brewing, I just bow out of the situation, because I just want peace and quiet.
Perhaps, like me, you feel you are walking on eggshells all the time.
Btw, in my case, I am divorced, and I think there’s a lot of ‘stirring’ going on, when she visits her father and his new wife.
Hope you feel better , knowing you’re not alone