Martha's wedding is so meticulously planned by her mother that she's not sure it's actually hers anymore.
So, typically, the big day is prematurely interrupted by a massive alien incursion.
The couple find themselves stranded uselessly inside a half-demolished church with a reverend, half their tactical team and someone named Jim. Mickey looks around, shrugs and says, "Might as well, yeah?"
As Martha's walking down the aisle, the 'why not's seem countless. She met Mickey just months ago fresh off a failed engagement. She'll never stop hearing about her family's marked absence. She's not even wearing a dress.
But she sees Mickey's grin shining through smudges of plaster dust and notices he hasn't put his rifle aside even for this. That's when her last ten steps become suddenly effortless.
This isn't her family's perfect wedding (or their perfect groom), but the whole thing certainly suits them.
Of course it's right.