Tell my sister-in-law to buy clothes in her shop tomorrow, and she will reply that her family doesn't bargain. What does this mean? Don't want me to buy it, or look down on people?

This is normal, or maybe you think too much. In business, maybe she has three rules with her partner, because everyone has relatives and friends. When relatives and friends come to the store to buy things, they all bargain at a discount. It is not good to give more or less. Occasionally there may be no problem, but too many times will lead to contradictions, which may lead to the final dissolution. She told you in advance that she was afraid that after you looked at the price, you would check online and find that the price of clothes in the store was much higher than that on the Internet. If you don't understand the situation, blame her for killing so hard, and she can't do it.

In fact, I think this is very good, which shows that your sister-in-law is a qualified businessman. You must understand her. It is not easy to do a physical store now, especially to sell clothes.