Father Stops His Daughter's Wedding to Have Stepdad Walk Bride Down the Aisle With Him

The traditional wedding ceremony for a bride involves the biological father walking his daughter down the aisle to pass her off to the soon-to-be husband. Obviously that isn't always possible depending on the circumstances. But what happens when the daughter technically has a biological father and a stepfather?  Most of the time the dad who brought her into the world assumes the responsibility.
Then again, there's Todd Bachman who went out of his way to stop the wedding procession and bring his daughter's stepdad to the altar with him, causing almost every person in the crowd to break down into a puddle of mushy tears.  Can you blame them?