Simplify the following text for a Grade 10 native English-speaking person.
Original: In her statement she claimed that both her grandmother and aunt , Jennet and Ellen Bierley , were able to transform themselves into dogs and that they had `` haunted and vexed her '' for years .
Simplified: She said that both her grandmother and aunt , Jennet and Ellen Bierley , were able to change themselves into dogs and that they had `` haunted and vexed her '' for years .