Judas screwed up his nose. "That guy isn't so great," he said, "Looks like a bitch to me." Of course, he would never say that within earshot of the man. Never at all ever.
Was he jealous? A little. She was the closest thing to anyone important he'd ever had, these long years of immortality. That people liked her enough to want her around did fuck him up a bit, if he was honest. The other apostles might be assholes, but Mary was his asshole. Uh... kinda.
So he went with being an asshole as well, as usual. "You mean I can start making money off you? I should have started that a long time ago."