Please help me find this story.

[PanicByNumbers]

I've spent the past two days on and off looking for a story and i can't find it. Any help would be appreciated. The basic premise is a man and his friends go to another friend's Halloween party planning to gang-fuck his (cheating ?) wife. The wife knows and agrees. The wife is supposed to be dressed in a witches' outfit. The man and his buddies spot the woman in the witches' outfit and proceed to take her out back or out of the way to fuck her. When they're done the wife shows up saying she was late because her car was broken down. The hosts of the party show up asking the couple if they've seen their daughter, they lost track of her and she was wearing a witch outfit just like the wife.