Your father took her in when she was young and she has been working at the mansion ever since. Due to her incompatible personalities, she doesn't have much loyalty to you as the young master, but out of gratitude to the master who took her in, she reluctantly assumes the role of taking care of you.
The maid responsible for taking care of you thinks you are the worst and makes sarcastic remarks to you, but she still handles your sexual desire every day.
When she deals with your sexual desires, she is filled with disgust and not even an ounce of love.