I walked into the living room, intending to close the laptop, to put it away on his desk in the study. But the words on the screen caught my eye. It was a private message forum, a dark-themed website with a name that made my stomach clench:  "The Player' s Sanctum." 
A user named  'AlphaDave'  had just posted a long message. I knew it was him. David.
 "The key is to make her think your sacrifice is for the family,"  his message read.  "I told my wife the long hours were for a promotion, for a bigger house for us, for our son' s college fund. She buys it every time. She even packs me a  'late-night work snack.'  Last night' s snack fed me and my new girl, Jessica. The trick is to build a foundation of absolute trust, so when you lie, it' s just another brick she thinks you' re laying for her future." 
I read the words again. And again. They didn' t feel real. They were cold, methodical, a strategy memo from a man I didn' t know. This wasn't just cheating. This was a philosophy.
Another user replied,  "Damn, AlphaDave. You' re a legend. My wife is getting suspicious. She keeps asking where I am." 
David' s response was quick, typed just moments before he must have left.  "Rookie mistake. You don't just lie about where you are. You create an alternate reality. You bring home small, thoughtful gifts. You praise her for being so understanding. You make her feel guilty for even doubting you. And you use the kid. Kids are the ultimate shield.  'I was helping Ethan with his secret project for you, honey.'  Who' s going to question that? She feels like a monster if she does." 
My breath caught in my throat. The secret project. The birdhouse. Last week, David and Ethan had spent a whole Saturday in the garage, hammering and painting. David had told me it was a surprise for my birthday next month. He' d made me promise not to peek. He' d used our son. He had turned Ethan into an accomplice.
A cold dread seeped into my bones, a feeling I hadn't felt in nearly a decade. I looked around the perfect living room I had curated. The family photos on the mantle, us smiling at Disneyland, Ethan on David' s shoulders. The throw blanket I' d knitted, draped over the armchair he always sat in. It was all a stage. A set for his performance.
He thought he was the director. He thought I was just an actress, a prop. He had no idea I used to own the entire theater. He thought this manipulative game was his own invention. The irony was so thick I could barely breathe. He was an amateur playing in a world I had built and then abandoned.
Just then, the front door opened.
 "Honey, I' m home!"  David' s voice boomed through the house, cheerful and loving.
I snapped the laptop shut, the click echoing in the silent room. My heart was pounding, a frantic, trapped bird against my ribs. I turned, forcing a smile onto my face that felt brittle, like it might crack.
He walked in, dropping his keys into the ceramic bowl by the door, a little ritual he did every day. He looked every bit the part of the devoted husband. His tie was slightly loosened, a signal of a long, hard day at the office. He came over and kissed my cheek.
 "Long day,"  he sighed, sinking into his armchair.  "But I closed the Henderson account. It' s huge, Sarah. This is going to be big for us." 
 "That' s wonderful, David,"  I said, my voice sounding distant to my own ears. I watched him, really watched him. The charming smile, the tired eyes, the whole well-rehearsed act. He was a master. But his performance was full of holes only a true professional could spot.
He leaned back, closing his eyes.  "I couldn' t have done it without you holding down the fort. You have no idea how much it means to me, knowing you and Ethan are here, that everything is perfect." 
 "I' m happy to do it,"  I said. The lie tasted like ash in my mouth.
He left a few minutes later, saying he needed to run to the store to get milk for Ethan' s breakfast.  "Be right back,"  he' d said with a wink.
The moment the door closed, I didn' t hesitate. I grabbed his tablet from the charging stand on the kitchen counter. His messages were synced. I opened the app. His conversation with Jessica was right there at the top.
 "Leaving now. She bought the whole  'work'  story. See you in 20." 
Below it was a picture she had sent him an hour ago. She was pouting at the camera, wearing a lacy black bra. The background was a hotel room I didn't recognize. The caption read,  "Hurry back. I' m waiting." 
I put the tablet down, my hand steady. The shock was gone. The hurt was there, a deep, cold ache. But something else was rising to the surface. A dormant part of me, a ruthless, strategic mind I had locked away for the sake of love and family.
David had broken the seal. He had shattered the illusion I had so carefully built for myself. He thought he was the player, but he had just challenged the creator of the game to a match. And I never lose.