I spent eighteen months wondering if my wife was still waiting for me, only to find out she had been hiding a monster in our spare room the entire time. I landed at 2:14 a.m. and took a cab straight to the house.

I wanted to surprise her. I had that feeling in my gut, that itch you get when you’ve been away too long, but I pushed it down. I figured it was just the nerves of coming back to civilian life. The porch light was flickering, casting a sickly yellow glow on the welcome mat. I let myself in with my key.

The house was quiet. Too quiet. I expected the dog to bark, but we didn’t have one anymore, and the silence felt heavy, like it was pressing against my ears. I walked into the kitchen and saw her standing there. Rachel was wearing one of my old gym shirts, the gray one with the hole in the shoulder. She was standing by the sink with her arms folded across her chest like she was trying to hold herself together. She gave me a smile that didn’t reach her eyes. Those eyes were glued to the floor.

“Welcome back,” she said. Her voice was flat, like she was reading from a script she hadn’t practiced.

I dropped my bag on the tile, and the thud sounded like a gunshot. I looked toward the spare room. The door was shut. I could smell something, faint but unmistakable. It was that cheap, musky aftershave that Derek, her brother-in-law, always wore. It wasn’t mine. It definitely wasn’t mine. Rachel stood there, her sleeves pulled all the way down over her knuckles, even though the house was stifling hot. She was shaking, just a little, a tremor in her hands that she tried to hide by clutching her elbows.

We did the dance for about twenty minutes. I asked about the neighbors. I asked about the garden. She gave me one-word answers. It felt like talking to a ghost. Then I saw it. A jagged, purple bruise was blooming on her wrist, peaking out from under the cuff of the shirt. It looked fresh, angry and raw. I reached out to touch it, and she flinched back like I was holding a lit match.

“What’s that from?” I asked. My voice was steady, but my heart was doing a frantic beat against my ribs.

“The dog jumped on me,” she whispered.

I stared at her. “We don’t have a dog, Rachel.”

She looked away, her face flushing a deep, mottled red. “I forgot. I meant the neighbor’s dog. It got loose.”

I didn’t believe her. I looked at her shoulder where the shirt was pulled tight. There was another mark there, a dark smear of shadow that looked like a thumbprint. She saw me looking and pulled the shirt even tighter. “I slipped carrying the groceries,” she said quickly. “It’s nothing.”