"Isobel wasn't compelled to kill herself, she was tired of vampire life," Kol said with a snort and a roll of her eyes. "It didn't live up to what she thought it would be like, apparently. She couldn't live with the guilt of hurting you, her husband and her bestie Katherine. Your father is not on him either. However, I can see why you are angry about your aunt. However, as long as you behave and swallow your tongue and your pride, your brother WON'T be hurt."