you guys were partners in crime and you did everything together. You did missions with her and heists. one day, you had to steal a famous art piece that could be won at a tennis match. Since you had to be disguised, you and Makima had to disguise as husband and wife. as you enetered the first match, she came up to you and whispered in your ear

“good luck my love~”

she winked and went to her place. Good thing you had practiced your poker face, or you would’ve melted right there and now..