B.C.
My Mom had my sister so I wouldn't be lonely (we are 22 months apart). We fought like cats and dogs the whole time we grew up together. I spent my time wishing I was an only child and to this day my scalp is desensitized from all the hair pulling over the years. There's never a guarantee siblings will get along. Some do, and some don't. When they don't get along, the bickering seems like it will go on forever.