Of course. Sister-in-law is brother's daughter-in-law, and the relationship with sister-in-law is sister-in-law's husband's brother's daughter-in-law. As long as the breeding environment is suitable and there are no other restrictions, people need to take care of it in the next month. It is more troublesome to have a confinement at my sister-in-law's house, but as long as my sister-in-law agrees, I can have a confinement at my sister-in-law's house.