Olga, I was the baby in my family, and a GIANT surprise to my parents; consequently, I was like an only child. I played alone quite a bit, and therefore learned to improvise. I could turn an oatmeal box filled with dirt into a grocery store.
My parents rarely fought, but one time I do remember that they had an altercation, and it scared the hell out of me. Often, it's the infrequent arguments that frighten a child more, I think.
Now my kids? Wow! talk about sibling rivalry! but when one or the other is in crisis, I am still amazed at the total dedication they have in helping work through the problems.....
I did many things that were wrong, but I like to think that I did more right. and in between, my husband played the bass.