it is the mother of her husband who had come forth to accuse her daughter-in-law of intercourse with satan , and of murder ; and the two small sons of the unfortunate comtesse have joined with their grandmother in her accusations , while the only daughter of the accused witch , one charlotte , aged twenty and exceedingly beautiful , has already fled to the west indies with her young husband from martinique and their infant son , seeking to avert a charge of witchcraft against herself .