I dreamed of my deceased sister, decorating the house for Christmas. What does this mean?

My sister put large Christmas decorations in every room. One room had 2 twin beds, she said these were for her grandsons when they come to visit, another room had an empty crib, maybe two, a third room had a large bed. All the beds were made and nothing was out of order. She had also taken a room that I claimed as mine, when I told her I needed my room, she said ok, no problem at all. Although she was talking to me, her mouth never opened or moved to form the words.