I thought my father-in-law's trousers were dirty, so I let him wash them himself. Is it my fault that my mother-in-law hit me with a bowl?

I took my in-laws to live with me two days ago. Wash all the clothes at home after work, and my mother-in-law is responsible for cooking three meals. I put my coat in the washing machine, but I wash my underwear by hand. When I was soaking clothes, I found that my father-in-law put his pants in our clothes, which was nothing. I used to wash my parents' underwear when I was a child. But when I turned my pants out, I was shocked. I wonder how long it's been since my father-in-law changed his pants. Yellow stool and red blood (I suspect hemorrhoids) are all over the bottom of the file. I felt sick at that time, but I also endured to rub it clean with my hands. In the evening, when my husband came home from work, I told him about it and asked him to communicate with his father. Later, my father-in-law can wash his trousers and take out his coat. At dinner, my husband told his in-laws about it at the dinner table. Who knows that my father-in-law refused to eat that meal with a sullen face, but my mother-in-law threw the bowl on the table and shouted at me: What is this? I didn't raise your husband when he was a child. Now that you have grown up, you think the old man is dirty when you look back, don't you? We will leave tomorrow so as not to live here. When he said this, he burst into tears. My husband was shocked and quickly put in a good word. I don't know what to do at once.