My husband asked me to let my sister be his “wife” for one night. He said it like he was asking me to pass the salt.

By the time Carissa Hale got home that Tuesday night, the city had already turned the color of wet steel.

Chicago in late October had a way of making every window look lonely. The towers downtown glowed through mist, traffic hissed on Lake Shore Drive, and people who had spent the day pretending to be important were peeling themselves out of office clothes and trying to remember who they were at home. Carissa parked in the narrow driveway behind the brick two-story she had bought three years earlier in Lincoln Park, sat with both hands still resting on the steering wheel, and let her eyes close for exactly six seconds.

Six seconds was all she gave herself.

Then she went inside.

She had argued three motions in Cook County that day, fielded two panicked calls from junior associates who billed like they were allergic to clarity, and signed a stack of documents thick enough to refinance a stranger’s life. The kind of day that would have crushed some people had simply been Tuesday for her. She kicked off her heels in the mudroom, carried her laptop bag into the kitchen, and started water boiling for pasta because cooking, unlike people, still responded to effort.

Damen Cross was already home.

He had been home for hours.

He was stretched across the couch in gray joggers and a faded Northwestern sweatshirt he had not earned, one ankle over the other, remote in hand, sports highlights flashing across the television. An empty energy drink can sat on the coffee table beside a plate he had somehow managed to leave there instead of walking it the additional twelve feet to the sink.

When she walked in, he turned his head just enough to register her shape.

“Hey, babe,” he said. “Smells good.”

He said it the way some men said grace—out of habit, without reverence.

Carissa didn’t answer right away. She set the pot, salted the water, opened the refrigerator, and started moving with the precision of a woman who knew that if she stopped even for a moment, fatigue would crawl up her spine and pin her to the kitchen floor.

Damen wandered in only after the pasta was plated.

He leaned against the counter while she set two bowls down at the table, and there was something too casual in his face, a looseness around his mouth she recognized from depositions and bad clients. It was the expression people wore when they had already decided what was fair and were simply waiting for everyone else to catch up.

Carissa sat down, twirled spaghetti around her fork, and was two bites in when he said, “So my ten-year reunion is next month, and I need Nikki to come with me.”

At first, the sentence did not register as language.

It was sound. Air. One more distraction in a life full of them.

Then it arranged itself.

Nikki.

Her younger sister.

Need.

Come with me.

Carissa kept chewing because sometimes the body moved more slowly than humiliation. She swallowed. Set the fork down. Looked at him.

“What did you just say?”

Damen rolled one shoulder as if she were the one making the moment heavy. “My high school reunion. Next month. I need Nikki to come with me.”

Carissa stared long enough for a lesser man to feel stupid. Damen only reached for the Parmesan.

“Why,” she asked carefully, “would my sister be coming to your reunion?”

He didn’t look embarrassed. That was the first wound.

He didn’t even look cautious. That was the second.

“Because I need her there,” he said.

The kitchen went strangely clear around her. She heard the ceiling fan, the refrigerator compressor, the muffled rumble of an L train a few blocks away. Small household sounds seemed to sharpen whenever something catastrophic was trying to masquerade as ordinary.

“Try again,” Carissa said.

Damen sprinkled cheese over his pasta like he was explaining weather. “Back when we first started dating, some of the guys met Nikki at that barbecue your cousin hosted in Naperville. They assumed she was my girlfriend. I never corrected them. It was nothing. Then people moved, years passed, social media did what it does, and they all basically think I ended up marrying her.”

Carissa did not blink.

Damen looked up finally, saw that she wasn’t following his timeline toward the place he wanted it to end, and added the part he clearly thought would solve it.

“So I need Nikki to come with me as my wife.”

He said wife in the tone a man might use for coat or receipt.

Carissa felt the blood drain out of her face so completely it almost fascinated her. “You told your friends you married my sister.”

He exhaled, impatient already. “I didn’t tell them. Exactly. I just didn’t correct anything.”

“That is lying.”

“It is not a big deal.”

He said that too fast.

And there it was—that familiar, polished dismissal he used whenever he needed to shrink a disaster down to a scheduling inconvenience. Carissa had spent ten years watching him do it to overdue bills, bounced ideas, failed jobs, forgotten birthdays, bruised feelings, and now apparently to the fact that he had built a parallel version of his life in which she had been edited out and replaced by the prettier woman in her own family.

“Why can’t I go?” she asked, though she already knew.