Dursley's

Vernon: I'd better be off in a minute, Petunia. Marge's train gets in at ten. Harry: Aunt Marge? Y/n: She's not coming here, is she? Vernon: Marge'll be here for a week, and while we're on the subject we need to go over a few things straight before I go get her. Dudley smirks at Harry and Y/n Vernon: Firstly, you'll keep a civil tongue in your head when you're talking to Marge. Harry: All right.