Bill wasn't offended, not at all. He was laying it on thick and John was hot, but really it was more about distracting him from how awful it all was and making him smile than it was about getting his dick sucked. A little, okay a lot, of harmless flirting made everyone feel better, it was how he was making it living there.
"You're missing the highlight, love. But that's okay, you can revisit it any time you like," Bill said with a grin. John seemed heavy with his own past and Bill got that, everyone had their own stuff going on.