My boyfriend's name is Li Tie. When he was already in the process of marriage, I discussed with him that I would have the down payment for buying a house. He has a high salary and is responsible for paying for monthly payments every month. His name is written by two people. Howev

My boyfriend is Li Tie. When he was already talking about marriage with him, I discussed with him that I had a down payment for buying a house. He had a high salary and was responsible for paying for monthly payments every month. His name was written by two people.

However, when registering the property, he changed his mind temporarily and asked the property certificate to write his sister's name, and asked us to give his sister a living expenses every month in the future.

I looked at my boyfriend in disbelief: "What did you say?"

I held back my anger and tried to calmly say: "The down payment is paid by my family, and the monthly payment is your responsibility. What does it have to do with your sister? Why do you write her name?"

Li Tie's face became unfair, "Mengting, you have always been understanding in my eyes. Can you not make a fuss with me for such a small matter?"

I was so angry that I sneered, "Li Tie, please see clearly. I did not make a fuss, but told you righteously that this matter is impossible and there is no negotiation."

Li Tie had a gloomy face and stared at me fiercely, "Mengting, tell you the truth, I should respect my parents when I earned money, but I have to take it out to pay back the monthly payment in order to marry you. This is equivalent to the fact that this room is provided by my family. It is natural to write my sister's name in the real estate certificate. Don't be too selfish."

Li Tie continued to say with a scrupulous look: "There is something I want to explain to you. In fact, my sister is not my real sister. She was adopted by my parents when she was a child. They originally planned to marry her, but they didn't expect you to appear. My sister has been depressed because of this. It is not easy for her to take care of our family for so many years, but now she has lost me because of you. This room I wrote her name just to comfort her in form. Mengting, can you be kind and generous? Just treat it as compensation for her, okay?"

My head was blown up, afraid that if I listened, I would have cerebral infarction , so I decisively tore up the house purchase contract : "Let's just go here today, it doesn't make any sense to continue talking. You go home and calm down for two days first. "

Everyone talk about how to deal with this matter?