Douglas, my best guess would be Cumberland Street. It's possible it's Huntingdon Street though. I hope someone can nail it down with certainty for you. The picture was most likely taken in your Mom's bedroom. I can't imagine why it would have been taken anywhere else.
As we've discovered, the picture where Brigitte is leaving the house shows that it's Cumberland. It was thoughtful of the photographer to include the house number so that more than half a century later we could determine that she was married while we lived at Cumberland Street. :o)