Remus: You and Reg are going away this weekend?
Sirius: Wait, you can't go away this weekend! It's Teddy’s birthday! We're having a party!
Regulus: Well, I'm sorry, but James and I could really use a weekend away. You know, to reconnect...emotionally
James: There's this thing I really want us to do. I read about it in a…book
Remus: Well, can't you just go the next day?
Sirius: Yeah, we want everyone to be there. As much as I hate to delay my best friend doing…weird sex stuff to my baby brother