Dangereuse de l’Isle Bouchard was born about 1079 and her baptismal name was most likely Amauberge. She was the daughter of Bartholomew de l’Isle Bouchard and Gerberge de Blaison. She married her first husband, Viscount Aimery I of Châtellerault, sometime before 1109. We know this because she is recorded to have advised her husband to donate land to the priory at St. Denis en Vaux. They had five children in the seven years that they were together, including Eleanor of Aquitaine. But she did as she pleased and the marriage wasn’t going to last. She met Duke William IX of Aquitaine (yes Eleanor’s other grandfather) while he was traveling and he decided to take her home with her, she didn’t mind, but their respective spouses did.
William was excommunicated for the kidnapping. He installed her at the Maubergeonne tower of his castle in Poitiers and had her painted on his shield. Phillipa was visiting family in Toulouse when this was happening and was none too happy to find another woman living in her home. She complained to the nobles and the church but none were raise up against William and he didn’t care what the church had to say about returning Dangereuse to her husband, “Curls will grow on your pate before I part with the Viscountess.” Phillipa retired to the Abbey of Fontevrault. William and Dangereuse had three children of their own, though some think his son Raymond was a child with Dangereuse and not Phillipa since no references list him as a legitimate son.
When Phillipa died his first wife, Ermengarde, stepped out to seek revenge for her. In October of 1119 she showed up at the Council of Reims and demanded that Pope Calixtus II excommunicate William again and toss Dangereuse out of the palace. The pope declined but that didn’t stop Ermengarde from causing the pair grief until his death in 1127. History tells us nothing about what happened to her from then until her own death in 1151.