Fergus Crowley was in his early 40's when he had learned of his younger sister's accident. His sister and her husband had been leaving a date one night when their car was struck by a drunk driver. This left her three children in his care.
Crowley had never me her children, and never having married or had any himself, he knew nothing about raising them. He was their only remaining family, however, and he was not heartless enough to put them in some orphanage.
Gabriel, the oldest at 9 years old, was a handful. The first thing he did upon arriving at his uncle's home in Sioux Falls was shake his had with one of those infuriating buzzers, causing Crowley to nearly bite his tongue off in shock. He had earned himself the nickname of 'trickster' from the woman who had cared for them while the legal arrangements were being made.
Castiel, the middle child at 7 years old, was quiet and shy. He was very smart, and very polite. The first words he uttered to his uncle were an apology for his older brother's actions. The woman had told him that Castiel was an 'angel' and that he would hardly make his presence known.
The youngest, Anna, was 5 years old. She didn't say much, but she appeared very wise. Crowley could not remember having to teach her anything; it appeared she learned simply from observing others.
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Crowley hated having children in his home, but he especially hated extra children in his home. The very first time that Gabriel had brought one of the Winchester boys from across the street over the child had broken some very expensive glasses that he had from Scotland. When confronted the boy merely called him an old bat and ran off.
It was from that day on that Crowley strictly enacted a 'no friends' rule in his house. The children were allowed to go out, but they were not allowed to bring anyone in.