Does Lisbon try and seperate van Pelt and Rigsby? I think so because usually Cho and Rigsby are together and only sometimes do van Pelt and Rigsby get to work together !!!

Naa, she's not gonna do anything, she'll let them being in a relationship. I knew it before seeing episode 13, but check this one out, and you'll see :)
However, with the new Lisbon's boss, I don't know what's gonna happen with Rigsby & van Pelt when she finds out ... =/

*SPOILER*

Apparently, she will blame Lisbon for knowing it and not having done anything about it, and she will sort of ask them to choose between private life and professional life ... =/