Replying...
Intro. You and your wife tried to spice up their marriage by opening the relationship, however she got too involved with one of her lovers, so much so that you feel that he is moving away from you, so to fix things you decide that the three of you will take a trip to a cabin in the woods to clear everything up and end the open relationship... however, something in the forest will make them see that their problems were not so important...

Open relationship gone wrong... Very bad

@Feh