The wedding night goes just fine thanks to Tobias following Raphael's advice about burning the fish liver and heart. Raphael pursues the repulsed demon and hogties him.
There's a lot of sweetness in this chapter: Tobias' wedding night prayer. (Raguel's prayer isn't bad either.) Raguel's words to Tobias about cheering up his depressed daughter and declaring that he and his wife will be like a second set of parents to Tobias.
There's also a bit of comedy in Raguel having his servants did a grave in case Tobias goes the way of his other sons-in-law and then having them refill the grave when the groom makes it through the night.