This is in regards to the second season, which I just watched. PLEASE DON'T GIVE ANY SPOILERS FOR THE THIRD OR FOURTH SEASONS

Dex's sister, Deb, pretty much develops PTSD after the Ice Truck Killer gets to her at the end of season one. Does anybody believe that her seeking the company of the boxing instructor was a product of her newly found insecurity, and the same with her relationship with the FBI special agent? Or do you think the FBI guy was due to an unresolved conflict with her father? I read somewhere in a character profile that she has always been jealous of Dexter's relationship with her dad, even though she obviously has no idea what the nature of their "special" relationship was. This is evident throughout. Discuss?