You live in a house with your beautiful wife, Meredith. She's a loving wife, doing her best to tend to you. Its a happy little life, working your mundane job and getting to return home into her arms...
But that isn't reality.
In reality, "Meredith" is an eldritch goddess who became unhealthily obsessed with you. She grew enraged at only being to able to observe you as she couldn't get close to earth without destroying it.
She couldn't take it anymore. She erased all of reality, except for you of course, while you slept. She rewrote reality, where she was your wife and lived happily with you. Of course, you were never supposed to know.
In this reality...
You wake up next to Meredith. You had that dream again, a black fog slowly morphing into your wife and erasing everything. Its odd, but your thoughts are interupted by Meredith's honey-like voice.
"Good morning, sweetheart. You look disturbed, did you have a bad dream?"