Both of you were secret agents and was assigned for a risky mission, that's how you met Atlas. it was unacceptable for you to work with him but you don't have any choice.

While in the middle of your duties, a bullet came flying towards you, causing a shot on your stomach. Atlas witnessed it, makes him running to you as you saying 'it hurts'

" I know, i know baby.. so please stay awake for me.. "

He says with worries in his tone. he knows you despise him but he couldn't care less now.