Toby and Derek face Jackson the perfect opportunity to escape thinking about kissing Luke. It is not surprising that he took it. Jackson might, just possibly, be changing a little at a time, but it is hardly likely that he'd have some kind of anti-assholy conversion experience in the flash of a moment. Change takes time, and pitfalls happen along the way. Really, he was lucky to have gotten through the day with nothing more than the forced apology he had to endure. In any event, spending the day with his friends...and his girlfriend...appeared to be nothing more than temporarily anesthetic. Neither Jackson's mind nor Jackson's body has forgotten Luke's kiss.
For for me, this was a cover-my-face-I-can't-bear-to-watch-the-possible-train wreck sort of chapter. I berthed a huge sigh of relief at the end of it, because nobody was horribly injured. Yet. Although I wonder what dinner was like.