i think that ben and annie was in love. Just before Ben kills his dad he packs the doll of her in his bag. This means he has some feelings for her and in the last episode he still had it. He most still have feelings for her. So something must of happened like they got married, she died becuase she was peagent or she could of died in the purge

__________________
Hurley: What about the B-O-D-Y-S?
Michael: What are spelling, man? Bodies?
Walt: B-O-D-I-E-S.

Hurley: Dude, you've got some Artz on you.

Bernard: I'm a dentist, not Rambo.
Rose: And don't forget that!