Pairing #1: Harry/Draco
Idea: Draco thinks Harry's cheating on him, when in actuality, Harry's trying to get up the nerve to propose marriage.
Prompt: "If you think I'd stay with you after what I just read, you're crazier than I thought!"

Pairing #2: Severus/Remus
Idea: Remus walks in on Harry & Draco having lewd sex, when he had no idea they were even a couple, and talks to Severus about what he saw (Sev already knew about H/D).
Prompt: "Well what do you suggest?"