Simplify the following text for a Grade 7 native English-speaking person.
Original: In January 1692 , the influential John Churchill , 1st Earl of Marlborough , was dismissed on similar charges ; the dismissal somewhat diminished her popularity and further harmed her relationship with her sister Anne ( who was strongly influenced by Churchill 's wife , Sarah ) . Anne appeared at court with Sarah , obviously supporting the disgraced Churchill , which led to Mary angrily demanding that Anne dismiss Sarah and vacate her lodgings .
Simplified: Anne had been strongly influenced by Churchill 's wife , Sarah .