So my 7 year old has been picking on her brother who is 5, non stop for the last couple days. No matter what I do, yell at her, spank her butt or put her in time out she is constantly just picking at him. She has also been cursing at me, and her father. I do have 2 other children (3&1) and I am pregnant with twins, but she wasn't this way before.
Do do any of you know what could be causing this?