Was she always quick to "quit"? If not, then to me it sounds like y'all got back together too early. She still has confusion or uneasiness about something in the relationship.
Me: 43 W: 37 Together: 18 M: 15 D: 8 yrs old ILYBNILWY: March 2011 She Filed for D: August 2011 She moved out: Sept 1, 2011 Reconciled: May 2012 Divorce Case dropped: July 2012