My Awful Colleague Always Wanted to Stay in My Room, so After I Started Sleeping at the Office, She Broke Down and Demanded I Reimburse Her for Expenses

My colleague had been mooching off me for three months. We split the utilities, gas, and internet bills, but she always said, "It's not much, we'll pay next time." She ate imported fruits and snacks faster than I did. I got fed up and decided to sell the apartment and start sleeping at the company. She was furious and stopped me at the company, demanding to know why I was selling the apartment. "I urgently needed the money," I said calmly. She screamed, "Then where am I supposed to live? Are you doing this on purpose?!" I thought she'd stop there. But three days later, I received another message from her: "Honey, the rent is one month's deposit and three months' rent in advance, the first month is 7500, remember to transfer it to me on WeChat." "Let's make a rule, you buy it..."