Jem and Scout Finch both have separate bedrooms in their Maycomb home in Harper Lee's novel To Kill a Mockingbird. They apparently have a four-bedroom house, since father Atticus has a bedroom, and when Aunt Alexandra comes to visit, she stays in the guest bedroom. According to Scout, "ours were adjoining rooms," and the two ususally said good night to each other before shutting the door between them. Scout and Jem also had separate rooms when they stayed at Finch Landing, the family homestead which included six upstairs bedrooms.
They have rooms and beds just like any other kid.
I am thinking you are in a certain chapter that you have a specific answer to refer to. Had you included the chapter in your question, we could better help you.
One thing that does happen during the book is that the kids do sleep out on the back porch during the summer sometimes.
Another thing that happens is that Dill is found under Scout's bed. Then, after Atticus and Aunt Rachel okay Dill to stay the night, they sleep in Scout's bed together, but not in a disgusting way.