This The Mentalist screencap might contain
suti biashara, biashara suti, wamevaa vizuri mtu, suti, suruali nyayo, pantsuit, mtu wamevaa vizuri, suti ya suruali, nyayo, suti ya nguo, seti, and seti ya nguo.
The writers and actors don't want those two to get together. In fact, they laugh at the mashabiki 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 zaidi 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" au "they have a brother/sister relationship." But I've never seen anyone deny Jane and Lisbon's chemistry, so I won't focus...