"It is essentially a gag order, Mr. Malfoy." Don was intensely pragmatic and paid enough to not bat an eye at the subject of said agreement. "Miss Granger intends to glamour the mating mark until the claim naturally dissolves, an estimated period of 6 months. During that time, she asks for silence on your part. You are not to speak of the mark or the events leading to it to any person except Miss Granger."