My Roommate's Eccentric Sister Wants to Teach Us Some Manners

On my first day moving into the company housing after graduation, my roommate brought her older sister along. The woman was twenty years older than us, with a weathered face. Pointing at me and the other roommates, she said, “Young people like you are always ordering takeout, eating junk food, and spending money like there’s no tomorrow!” “I’ll cook for you. Just give me 2,000 yuan a month each!” “Also, I have a nervous condition, so don’t come back too late and disturb my sleep!” “And that room with the balcony looks nice. Leave it for me!” I stared at her in bewilderment. What kind of lunatic had let this woman loose?