Tohru will be so buoyant on her wedding day that even Kobayashi will be able to carry her without any back pain.
Imagine what a mess that reception will turn into. They'll have humans from two worlds, a fallen goddess, and dragons from every faction in the wedding party. They may even get gods trying to crash the reception for the exotic food. If that doesn't kick-off the Apocalypse, it may bring about world peace.