Hello xXEden_RoseXx. The most likely cause is furniture or other decor items that you have placed in the house. Even if it looks clear to you, she might think it isn't. Our little family members can be pretty picky about what "clear" means! There are several options to proceed in this situation:

• If she’s not in the room, put her back in there and try moving any items that are near the bedroom doorway, and the stairs that lead to the lower floor, including items on both sides of the walls of the blue room, green room, and large central room. I’ve attached a rough screenshot showing good areas to check.:)
• You could wait until a sock or wrapper show up in the room, have your little person try to pick it up, and the game will tell you that something is indeed booking the path and give you a clue as to what needs to be moved.
• Lastly, if you’d like to post a screenshot that shows basically the same rooms that my example shows, I’d be happy to examine it and assist you further.

Instructions on how to post a screenshot are here. Instructions on using the File Manager is about 1/2 way through the post. Have fun with your little family!