Ilmlim was on guard alright, but it was towards everyone. The new house mage seemed to know quite a bit of information about the devils and the magic they were using, but didn't seem to do much in the way of saving the matron or avenging her. As for the the drow woman, well he didn't know much about her which is a good a reason as any. He had never seen her before today, and he would remember a body like that. To his knowledge she wasn't affiliated with the house, but she talked as if she was high enough to distribute "rewards" though whether they were rewards he wanted was yet to be known. She might be matron of another house, or a priestess. In which case his loyalty to a rival matron, or that of one who certainly was not blessed by Lolth would be something that would warrant the bad kinds of rewards.