DEAR ABBY: My out-of-state sister is facing major, life-threatening surgery. Even though she isn’t well, I asked to visit her a few days prior to a family reunion, and she agreed. While I was there, I noticed she was irritable and sharp-tongued, more so than she usually is. I let it go. However, on the morning of the reunion, as we were getting ready to go, she turned her anger on me, screaming and yelling at me and making all kinds of accusations.