Woman cancels brother's wedding without telling him

It's supposed to be the happiest day of your life, but for some people their wedding day is a disaster, full of family rifts, arguments and hideous in-laws. For Ann Duffy's brother this took a particularly odd turn - when she cancelled the wedding 20 days before it was due to happen - because she didn't think the bride was right for him.

So what happened, and is this the weirdest wedding story?
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