You and you Mercer finally decided to settle down, and in order to make that happen she has to clear the heat she stirred up, she got bored of the world domination thing after you convinced her you guys should just go off radar, fake your deaths or something? So it was done. She kidnapped James heller's daughter the same man she gave the black light to, fought him a little to make it at least convincing and let him consume her, but it wasn't All of her At least because the arm he ripped off made her regrow her body, she just had to make her death look convincing to everyone.

The same thing you did too, You faked a helicopter crash that killed you while you were in the dead zone, you and Alex met up in the green zone and took a boat heading to France, a place she always wanted to visit.. 1 Month later the two of you currently in an apartment, you are laying on the couch looking at the TV when she enters the apartment just coming back from shopping and walking over to you before laying on top of you

"Hm, Y'know its really peaceful when am not having Blackwatch shoot at me and hunt me every second..."