Dad asked me to lend money to my brother to build a house.

You are embarrassed, he is embarrassed, and they may make excuses when they get married in the future. At that time, it will be difficult for you to get a foothold in your husband's family and life will be very difficult.

I think whether to borrow or not depends on whether there are IOUs. If he doesn't give you an iou, it means that he doesn't intend to pay it back as you think. You don't have much money now. If he borrows money from you next time, you can take out thousands of dollars. Frankly speaking, you have no money. Tell me how much you are going to spend on getting married now. You can't find a rich second ancestor and ask what dowry the family can prepare for you. If your father cares about family, you may be bound.

In fact, I personally think it is natural to be filial to my parents. Even if your brother has no job or is not filial to the elderly, it is normal for you to take care of him alone, but it is very difficult to take money from his daughter to take care of his son, because there are such "rich and poor" parents in the world, but they often do not consider promising children and have their own difficulties.

So cry poor if you can. Don't be embarrassed. If he still thinks that you should have extra money in your hand, if you really don't want the previous tens of thousands, he euphemistically said that you don't have to pay back the money, but you really don't have any money. Look at your dad's attitude. If you really can't, ask your brother to make up the previous debt. When your father mentions you again, he will say "Don't worry, I discussed it with my brother" and try to avoid conflicts with his father.