Willow was a nanny for several families in Desiderata Valley. What she did before she was a nanny is unknown.
Michelle Fischer asked Willow to live with her. She was carrying for Carl while Michelle protected herself for the sun. Willow met a young and handsome father Peter Carr and they started a relationship. When Carl was a teenager, Willow was no longer needed but Willow wanted to stay at Michelle's house. The two women got into a fight. Michelle was very angry and turned Willow and Carl into a vampire. Carl ran away with his vampire girlfriend. At the end of that night Willow and Michelle got into a fight again. There was one coffin for 2 vampires. Willow won and threw Michelle out of the house. Michelle died of sunlight.
Later, Willow moved in with Peter in Fear Valley. Their relationship didn't last long. Willow met Count Houwdegen in the local H&M. They flirted with each other and they woohoo'ed in a changing booth. Peter also cheated on her with several women. Peter moved out of the house when his daughter and her husband moved to college. He must take care of his granddaughter Morgan.
Willow married the Count and as a result of her marriage she became Contessa Willow Houwdegen. They moved to Houwdegen Mansion. Radbout and Willow gave a house warming party and they invited a few friends. One of them was Carla Cooke, Willow's friend. She told Willow about her happy family life and Radbout heard that. Radbout wanted to be a good father and have a big family. He wanted to fix the faults he made 800 years ago. After the party he told Willow what he want. However, Willow said she was to old to get children. Radbout was really upset about it.
Willow didn't want to see her husband upset and she started to search a nice women who would like to carry a child. So, she met Natasha Una who has just got a miscarriage and broke up with her fiancée John Mole. Willow and Natasha got along and she invited her at a diner in Houwdegen Mansion. The next night, Natasha met the Count and she liked him immediately. Radbout and Willow asked her if she would carry their child and Natasha agreed. However, Willow noticed the Count and Natasha loved each other, but Radbout didn't want to cheat his wife. And then Willow made an unexpected decision: she didn't want to be a vampire anymore and she wanted to divorce Radbout. He was shocked and she told him she couldn't fulfill his want and she was to old to be a good wife. She also said Natasha was a better wife for him. Radbout didn't agree and he said he really loved her and not Natasha. But Willow knew Radbout was in love with Natasha and she asked her for a favor. So, when Radbout was working, Natasha and Willow bought a Vamprocillin-D and Willow drank it. Radbout came home and he discovered the human Willow. First he was angry, but finally he knew it was her decision. Radbout and Willow divorced, but she may keep her name as an honor.
Willow moved to a little house in front of Carla's house. She got a job in the culinary career and she started dating Peter again. Then she met Victor Aspir. Willow and Victor became friends and so she met Victors widowed father Luis. Willow and Luis fell in love with each other and he moved in with her.
- Willow's Dutch name is Gravin Willemijn Houwdegen.