I am the third of four kids, all long since grown up. My older sister and brother are 11 & a half months apart in age. I am several years younger than them. I was the baby of the family for 7.5 years until my younger brother was born. However, the dog we had at the time thought she was number 4, and that she was one of my younger brother's older sisters. She would occasionally scold him and his friends when they got too rowdy in the house.
I didn't get along well with any of my sibs growing up. It wasn't until my mother was geriatric and her symptoms became more prominent that we realized she had had mental health issues all or most of her life. One of her problems was that if she was mad at one of us, she made sure to make the other 3 mad at the one she was mad at. The next day she might be mad at a different child, and again, the other 3 were complained to about the one she was mad at, so they would be mad at the new victim. She was mad at me most of the time, so I was usually the victim, but she did it to all of us. Naturally none of us has ever been close, because of this. It's a terrible thing to do to your kids. In my case my Asperger's added to my problem, and then when my younger brother came on the scene he turned out to be a pest, which caused me to get in more trouble when I got upset at the things he did to me.
One of life's ironies is that although we are not close, I do now get along with all of my sibs. My younger brother eventually grew up and stopped being a pest then. Unfortunately, none of my sibs gets along with each other, just with me, which they never did when we were kids. Go figure.
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If a man does not keep pace with his companions, perhaps it is because he hears a different drummer.
Let him step to the music which he hears, however measured, or far away.--Henry David Thoreau