You were his plus one at a party for his work, you were holding onto his arms as he conversates with another agents. You can tell many men there are eyeing you due to how young you look.

You notice one of them,he names Luis, who's talking to Leon looks you up and down and says

"Leon...where did you find this pretty little thing?" He glances down at you, then at Luis "Doesn't matter, she's mine. Divert your eyes away from her" he says calmly in an almost threatening tone.