The Physics of Infidelity

I didn't learn to swim until I was thirty-two. That should tell you something about the life I'd lived—cautious, terrestrial, never quite willing to submerge myself in anything that required surrender. But when Marcus started staying late at the office, when his wife's calls became his excuse to linger in the server room with me, I signed up for lessons at the YMCA.

The pool was the only place where I could stop thinking about him. About the way he looked at me across his desk, the cable management trays we'd both pretend needed adjusting while our hands brushed, the friend zone we'd simultaneously violated and inhabited for six agonizing months. In the water, I could just breathe, count strokes, exist in a medium where everything held you up even as it threatened to pull you under.

"You're getting better," he told me one evening, leaning against the pool fence while I toweled off. He shouldn't have been there. He should've been at home with his daughter and her new goldfish, the one she'd named Princess Buttercup. The one Marcus had described to me in such excruciating detail during our post-lunch coffee breaks that I felt like I'd already met it.

"Why are you here?" I asked, not meeting his eyes.

He stepped closer, lowering his voice. "Because I'm tired of pretending. Because every time you look at me like that—"

"Like what?"

"Like you're drowning. Like the only thing keeping you afloat is something you haven't let yourself feel yet."

I laughed, a short ugly sound. "You think I'm the one drowning? Marcus, you're married. You have a child. You come here talking about feelings like they're just another cable we can reroute, like we can just reconfigure the infrastructure of your life without bringing down the whole network."

"We could," he said. "If you wanted to."

The water lapped against the pool edge behind me, rhythmic and indifferent. This was it—the moment every affair story led toward. The choice.

"I swim to get away from complications," I said finally. "Not to create new ones."

His face crumpled. Something broke between us, something that had been held together by possibility and cowardice in equal measure. We both knew we'd never recover it.

That night, I drove to the pet store and bought a fish. Not a goldfish—that felt too close to something I couldn't have. A betta, brilliant red and solitary, perfectly content in its small contained world. The clerk told me they needed to be kept alone, that they'd fight with any other fish you put in their tank.

"That's okay," I said. "So do I."

The fish swims in circles now, endless laps in his little bowl. Sometimes I watch him and think about how we're all just swimming in different kinds of water, some of us chosen, most of us endured. Marcus messages me sometimes—work things, safe things. I respond in kind. We're professional now. We're friends. We're everything except what we almost were.

The lessons continued. I got better. Stronger. I can swim a mile now without stopping, rhythmic and certain, cutting through water that holds me up even as it reminds me: gravity exists everywhere, eventually. You can fight it or learn to move with it, but it never really goes away.

Neither do the people who taught you how.