[tenderfoot]

She is in a new environment and she might have had a good routine at her old home but this is a new house with new routines. Sleeping in the bedroom is ideal because the pack sleeps together and it helps your dog to feel safe. Being out in the living room makes her nervous so she whines, gets stressed and has to pee. She also looks at the larger space as a territory not a den, so she can soil in one spot and avoid it by going somewhere else.
Crate training can be great help and since she is older can take a few days -be patient with her.
Be sure that you keep the spot moist with an enzyme product for at least 24 hours - if it dries too fast it won't have time to work.