Why don't you go to an acquaintance's shop to buy things?

I will be embarrassed, very embarrassed. My sister-in-law is selling chicken business in the town. Every time she went to her house to buy things, she not only didn't need money, but also gave more things. Although relatives are very close, it is often embarrassing to do so. Now when I'm buying chicken and things like that, I've been bought by others. I'm really embarrassed to go to her house again, for fear that I won't need any more money. I guess most people don't like to go shopping in acquaintances' shops.