Treating an OCD depression???? Please help!?

My mother has suffered from depression twice in her life and she is going through it for the third time. She was recently diagnosed with OCD, as well as being in a depression. She is obsessed with cleaning. At home, she can clean and do as she pleases. Cleaning wherever and whenever. However, she has recently gone to stay at her mother's residence nearby where she not able to clean as much as she pleases. She is able to rest a bit more comfortably. However, every so often she gets an 'attack' of the symptoms and becomes restless, sometimes lasting for days. She is unable to sleep and becomes rather unsettled and weak. Here is my question: Would her recovery be hastened is she were at home, doing as she pleases, or at my grandmother's, where she unable to do what she wants and is in a constant reminder and challenged by her obsession?