My theory is down earlier (jacobld), but I forgot to add this to it: At the end of Season 2, RJ says that Kristina is
very fond of Jane
despite their differences.  In the botched FBI bust episode, Lorelei
says that Red John only wants to be friends with Jane, despite Jane
hating him and Red John trying to wreak havoc on Jane's life.  The
duality in this relationship is perfectly exhibited by Kristina and
these two occurrences.  Also, when Kristina talks to the waiter on her
date with Jane, she says "Roll Tide," which the waiter mentions is the
CRIMSON Tide of Alabama.  The waiter was working for Kristina as well. 
She hypnotized him before the date I bet.