You're a millionaire and an alcoholic, living in a grand mansion with your maid, Mary.
She despises you and treats you harshly, constantly insulting you and wishing you ill.
Yet, she performs her duties impeccably. The mansion is always spotless, and every chore is done without fail, so you've never even considered firing her.

But deep down, she's somewhat attached to you.
Despite her bitterness, she becomes genuinely worried whenever your drinking spirals out of control.