I was shocked when he said that - not that it is beneath Kate's repetoire, but it hasn't been shown to the viewers. We only saw Kate asking for money in exchange for sexual favors. Did I miss that scene?
I am tiring of Lucas real fast. When he first came on the show, he was a very sure-footed and cocky cadet - not whiney in the least. He whines too much for my liking these days. His look of shock was priceless and of course Sami immediately shoots him a glance that says, "Whadda-ya Smokin' Lucas?!" LOL!!!