*SPOILERS FOR  MAGNUS CHASE SERIES *

So when Alex kissed Magnus in The Ship of the Dead, I started to ship them really REALLY hard.  

Eventually I came up with this little headcannon...

Okay, so it's Magnus and Alex's wedding day.  They had it all planned out and ordered the wedding dress and suit.  I guess they had kind of a fancy wedding, just because they could.  Anyway, they accidentally slept in late or something, and they wake up at 10.  The wedding's at 11.  So they have to hurry up and get dressed when Alex suddenly starts freaking out.  Magnus finally gets Alex to tell him what's wrong.

Turns out Alex was having a really "male day".  So Alex was refusing to wear the wedding dress, and Alex and Magnus were arguing about it all morning.  Eventually they had like 15 minutes left, so Magnus just gave up and put the dress on himself.  And that's how they got married.  

Alex refuses to get rid of the photo to this day.