Missed the sign Stephen King...
His reaction should have given it away. Just a simple observation made but a grand reaction.
The couple had sat down to watch Kujo for the first time. The movie introduces their family of main characters; a husband and a wife in a kitchen making breakfast and getting ready for the day as their neighbor friend drops off a gift for their child.
Back to reality; our young woman makes her way to the kitchen to start making dinner for her fiancée and herself. She can see the television from where she stands in front of the stove.
Both women are stirring a pan.
“They’re sleeping together.” She predicts with a smile.
Irony and serendipity.
The fiancée reacts emotionally as if he misheard her. As if he’s been caught.
“What?” He exclaimes before realizing his error.
“What makes you think that?” He corrects but there’s still a hint of anxiety in his usually cheerful voice.
“She doesn’t look at him at all and she doesn’t say anything to him until he’s leaving. They’re sleeping together, I bet you anything.”
The woman who loves him was talking about the wife and neighbor on the screen.
“That doesn’t mean anything.” He defends. The woman who loves him just smiles.
“I’m psychic. They’re sleeping together just wait.”
The next scene reveals the wife in bed with the neighbor saying that this time it really was the last time.
She sits there like The Mona Lisa. He says nothing.
His reaction should have been her first clue but for how many months longer would his betrayal remain unknown.