I thank you for the responses above.

@unaluna - I actually was attending an Al-Anon group to prepare for this visit. Back a few years ago, I was with my sister (the one with the daughter), and she seemed to get angry at me one evening after she had been drinking. I hadn't been drinking. Her mood change came out of the blue. I reacted by leaving her home and getting a hotel room. My boyfriend had just died, and I was at my sister's, supposedly so she could provide me with support and consolation. The plan was that she would put me up and take me to the funeral. I was horrified when she turned on me. After I flew back to where I live, we were on the phone to each other. We mended the rift, and all seemed well. I regretted the way I reacted, in leaving her home abruptly, which was hurtful to her. I deeply regretted that. At Al-Anon, I discussed this and my hope that, in future, I simply would not react to any alcohol fueled mood changes.

My good intentions came to naught.