I love Lisbon, don't get me wrong, I adore her and I've always wanted her to be with Jane. I've never questioned her loyalty up until the episode where she finds Patridge. I found it odd that Red John kept her alive, why would he keep her alive when he hasn't shown mercy to Jane in the past.

I though about Jane being RJ but he got the call about Lisbon so he wasn't there. I don't think she is RJ but I do think she might be involved with him somehow. Why would he spare her?