Be assertive, but not aggressive

WE have been married for a year and used to live on our own. I’m 24 and things were good until my sister-in-law moved in with her two sons and her maid after quarrelling with her husband. She refuses to stay with her mother because she is afraid her husband will cause problems. Besides, the maid does not have a permit.

Sister-in-law wants to divorce her husband and has sent him a letter about that. She has some savings and skills and has opened a shop, with my husband as partner. I think the partnership makes her feel more secure about many issues, including money. But I feel sorry for my husband, who worries about her because her husband is a problematic person.