Martha Watson was the human name that she had taken. There were very few people that knew that she was a demon, one of the Old Ones, the oldest of the old demons, the most ancient and venerated. When she went to visit the Demon Plain, she was revered. Here on Earth, she was a kindly older woman who mostly kept to herself.

But she had an important job. She also was part of the group that monitored what the Demons on Earth were up to. If any of them started to cause any trouble, she had her 'goon squad' that she called to straighten them out. Since she was at top, the head of that division, most of her job was bureaucratic, dealing with communication between Earth and the Demon Plain, when it came to doling out punishments, which more than occasionally meant death for repeat offenders.

She was formidable, and she had lost rank and status when she fell in love with, and married a human man. And when they had a half demon son, she was almost exiled, she was persecuted, but she had made friends in high places, and she fought her way back up the ladder. and her son, called John in the human tongue, ended up being a good example for human/Demon relations. He had even joined the human Army.

Martha was proud of her boy, but it had been so long since he had been in touch. She had no idea if he was even still alive.

Being an Old One and having such power meant that she could work in her modest home on the outskirts of London.
She was in her office one day when the phone rang.

"Hello?" She asked, putting on a voice that sounded like an older human woman, a part of her cover.