All I Need Is In Front

"you're my neighbour/best friend and your parents are coming to visit and you've apparently told them we're dating because they found out you were gay so could i please be your pretend boyfriend for like two days you will pay me in concert tickets and mac and cheese" au (adapted prompt)Alec has been crushing on his neighbour, pretty much since they met. The problem is, they don't just live across the hall from each other, they're also good friends, and as handsome as Alec finds Magnus, he doesn't want to lose the friendship. But then he accidentally tells his parents that he and Magnus are dating, and in a surprise turn of events, Magnus agrees to pretend for the duration of his parents visit. But just how 'fake' is this relationship?