This woman was then forced into exile, ending her regency.
One son of this woman eloped with Marguerite of Lorraine before being exposed by the Duke of
 Montmorency. That son was Gaston, Duke of Orleans. A more notable son of this woman was convinced
 by Charles d'Albert to break with this queen, despite a peace that had been established via the Treaty of
 Loudun. This woman was then forced into exile, ending her regency. She had gained political power after
 Francois Ravaillac killed her husband, believing his conversion insincere. For 10 points, identify this wife
 of Henry IV, a member of a famous Italian noble family who controlled France during the minority of
 Louis XIII.
One son of this woman eloped with Marguerite of Lorraine before being exposed by the Duke of
 Montmorency.
{Marie} de {Medici} [prompt on partial answer]