This The Mentalist screencap might contain
деловой костюм, хорошо одетый человек, костюм, брючный костюм, костюм брюки брючный костюм, портрет, выстрел в голову, близком расстоянии, макро, and крупным планом.
The writers and actors don't want those two to get together. In fact, they laugh at the Фаны that want them to. Which personally I find a bit rude, but I won't get into that. Anyway, their reasoning for them not getting together (at least right now) is "they have еще of a brother/sister relationship."
I'm sorry, but every time someone is trying to make an argument for why two people shouldn't be a couple, it's always either "they have no chemistry" или "they have a brother/sister relationship." But I've never seen anyone deny Jane and Lisbon's chemistry, so I won't focus...