Almost 2 weeks ago, I went to the hospital extremely sick (septic) with an intestinal infection. I was in close touch with my two sisters who live thousands of miles away, and they seemed very concerned. One of them hasn't contacted me in 11 days, which is beyond odd.

She tends to be emotionally volatile and has anger issues. I thought we were getting along great and have no idea why she would "ghost" me right now, especially given that I was so terribly sick.

Over a week ago, I texted her to call when she had time to chat. I might have to go back in for surgery, and I had some things to ask her because her daughter recently had a related surgery. Nothing.

She is the baby of the family, and we've all always made excuses for her. But this cold-shoulder that she's doing to me now has me really disgusted. Whenever she has had a crisis, I've been there for her. I'm talking about real support, sometimes to the tune of a good amount of financial help. Long ago my parents (who are deceased) told me that I was underestimating how selfish she is. This really takes the cake.

11 days ago, I asked her to call me. No response. I'm leaving the ball in her court. I was just almost going to text her: "Eff u too." But I won't lower myself to that. I really can't even take this personally. She has weird anger issues. When drinking, she's been put in handcuffs a time or two or three. I feel bad for her that she's this unbalanced.

Back in 2009, I called her from the emergency room to say I had gotten awful sick. She answered drunk. I could tell she was at a bar. She got mad at me and said she had enough problems of her own and hung up. Over the years, she has called me at times when she was drinking and said, "I love you so much."

I have another sister who has kept in touch like a normal person.

How could I know someone for so many years and be completely blindsided by this person just turning on me? Like I said, I can't even say I'm really that hurt. I don't think this is even about me.

When my father was in the nursing home at the end of his life, I flew out to see him. He broke down crying, saying this sister hadn't been visiting him. I guess she's got a cruel streak. Nobody in the family treated her cruel. I guess, deep inside, humans have their mysteries.

The last time I did talk with her, she told me her mother-in-law had just died. She said she wasn't going to the funeral because she's been mad at her in-laws for years. Her two adult daughters were going to the funeral of their grandmother. My sister seemed a bit peeved about that. This sister is probably the person I have loved the most in my family. I used to push her in a stroller around the neighborhood and heat up her bottle of milk at bedtime because we're that far apart in ages.