In the secret Annex, the Frank family and the Van Daan family all live together. there's Anne, Margot, Otto and Edith Frank along with Peter Van Daan, Mr. Van Daan and Mrs. Van Daan. Also Peter's cat.
Though it was crowded, the secret annex had a couple, maybe three rooms. One of the rooms was for Peter, one for Anne, one for Mr and Mrs. Van Daan and Margot, Otto and Edith shared the living space.
Even though they were safe, there were a lot of concerns. They always had to be quiet was one thing and one night Anne had a nightmare and ended up screaming in her sleep. That could've put all their lives in danger.