Lies and Deceit Quotes in Freedom

How we cite our quotes: (Book.Chapter.Paragraph)

Quote #7

To be able just to laugh and shrug and walk away: to be more like Jenna, who, for example, knew almost everything about Connie expect the fact that Joey had married her, and who nevertheless considered Connie, at most, an adder of thrill of piquancy to the games she'd like to play with Joey. Jenna took special pleasure in asking him if his girlfriend knew how much he was talking to somebody else's girlfriend, and in hearing him recount the lies he'd told. (3.5.56)

OK, now here's a mystery. Why is Jenna the one person to whom Joey tells everything? An easy answer is that she just has a mystical (read: sexual) power over him. But is there something more significant that we're missing here?