Killian stared at Williams in surprise because he wasn't expecting him. He did not like the fact that Williams barged into his house without knocking or without his consent because he had planned to hide the issue of Cassy's betrayal from everyone and keep her as his prisoner.
He felt ashamed that she choose Derrick over him and he did not want to admit it to anyone else because his ego was so badly hurt. However, Williams was already there and he knew that he could not hide the truth from him. Seeing the expression of surprise on Williams' face, he knew that he definitely had a lot of questions but that didn't matter at the moment because he was more interested in why Williams barged into his house.
After staring at him for a few seconds, he asked him, "what are you doing here? and why
