Kara didn't feel right hanging around Otto right now so when she heard "business" she immediately left into the shadows. Either out of respect or anxiety. She used to think Otto only kept her around for her skill but having the idea that he may be keeping her around because of her relation to Kallen just made her feel both used and uneasy. Kara wanted to put a bullet in Otto's head if this was true but if she did, not even Yae would forgive her, let alone Theresa.