I recently adopted Sophie in a visit to Windhem and she's now living in my Heljarchen house, the one I'm using right now, and the only quest I could have to build a house in this dlc, the other two were just spoiled and the characters who were supposedly giving it, didn't.

So well, Sophie is living at home and that fact made my main room bed disabled.
That is rare because Sophie has her own bed. I don't have a kids room in Heljarchen, but two more beds available near the main room. Do I have to acquire a kids room?