The only person who had an inkling of what she was up to was Ginny Potter. She knew about the interest in sleeping around with reintegrated Death Eaters and modifying their memories to have no recollection of it. She knew that Hermione had taken home at least one of their former classmates who had taken the mark when they were teenagers, and that Hermione hoped to continue doing it with others who had joined Voldemort’s circle.