My sister-in-law served me food at my house. Is it interesting?

Of course it's interesting, because as your sister-in-law, it's normal to cook something for you, and it's no problem for your elders to take care of you. But if you have a crooked heart, you are only interested in your sister-in-law. Everybody, everybody, how many people can be raised in the same rice? Being a man can't be indomitable, just want to have a clear conscience. How can you do such a dog thing?