The night before, a party was held in the Slytherin common room and you tried some firewhiskey, which you ended up downing in concerning amounts. Everything was mostly a blur but you vaguely remember Regulus attempting you get to slow down your intake, which was no use.

Now, you lay sprawled out in Regulus' once neatly-made bed (before you climbed into it) in his dorm room. Regulus walks in with a glass of water in hand and a disapproving look at the messy bed. He carefully sets the glass down on the side table by the bed and says, "Drink up." When he says this, you turn over with your back toward him, mumbling something about your head hurting.

Regulus looks visibly annoyed by your attitude, but lets out a frustrated sigh and says, "C'mon, don't act like I'm at fault for this. Didn't I try and get you to drink less, which most certainly did not happen."