He vowed to cherish the wrong sister

Mary had always wanted a family -- a real one, in which she could love and cherished in return.

But when her father conned her into stalling for time at her twin sister's wedding, Mary never dreamed Margaret wouldn't show up as promised to take her place.

The groom accepted the switch philosophically. He needed a wife, a mother for his daughter, and he wanted a son. And although he didn't necessarily love her, Mary found herself hoping that Margaret wouldn't turn up to spoil things.