Mother-in-law wants to stay over, Part 2

I know my mother-in-law is pitiful, I get it. My own mom is also living alone. But even when my mom visits, she just eats dinner and leaves! She says it'll disturb my child's studies~ I went to my in-laws' house with side dishes I made over the weekend, but my mother-in-law wouldn't open the door. I left the food containers and sent a text, but she read it and didn't reply. I clearly told her she could stay over after the college entrance exams were done. Nobody remembers that, and only the rude daughter-in-law is left. If it were you, would you give up your room for your son who's in his final year of high school?