I only walked away for a few minutes.
That was the part I kept replaying afterward.
Not an hour.
Not half an afternoon.
Maybe seven minutes.
Long enough to cross the hot sand to the little beach stand near the boardwalk, wait behind a family buying frozen lemonade, grab two bottles of water, and walk back toward the pair of lounge chairs Lauren and I had claimed that morning.
Seven minutes.
And when I came back, a man I had never seen before was standing behind my wife with both hands on her bare shoulders.
At first, I stopped because my brain needed a second to catch up with what I was seeing.
Lauren sat sideways on the edge of her lounger in the green bikini she had bought specifically for this trip.
The stranger stood behind her.
Tall.
Athletic.
Probably early thirties.
Dark hair.
Sunglasses pushed into it.
He was slowly spreading sunscreen across the center of Lauren's back.
Not awkwardly.
Not like some random person had been asked to help with one unreachable spot.
His hands moved with the confidence of someone who had already decided the contact was welcome.
One palm crossed her shoulder blade.
Then the other.
Lauren tilted her head slightly to keep her hair away from him.
She was smiling.
That was what made something cold move through my chest.
She looked comfortable.
If she had looked embarrassed, I could have explained it away.
If she had startled when she saw me, I might have believed she'd been put into an awkward situation.
If she'd looked irritated or even guilty, at least I would have known she understood how it appeared.
She looked relaxed.
There is a difference between knowing your spouse and merely recognizing them.
After seven years of marriage, I knew the difference between Lauren's polite smile and her real one.
Her polite smile barely touched her eyes.
The smile she gave that man was the same one she used to give me across crowded rooms when we first started dating.
I stood there with two sweating bottles of water in my hands.
Neither of them noticed me immediately.
Or maybe they did and didn't care enough to react.
I walked closer.
"Who is this guy?"
Lauren finally turned.
Her smile didn't disappear.
She laughed.
Actually laughed.
"Relax, Adam."
The stranger moved his hands away from her shoulders, but without the urgency I would have expected.
Lauren gestured toward him.
"He's only helping me with sunscreen."
Only.
That word lodged somewhere behind my ribs.
I looked at the man.
He gave me an easy smile.
"Sorry, man. She couldn't reach the middle."
I looked at the sunscreen bottle on the towel beside her chair.
Then at Lauren.
"You could have waited seven minutes."
Her expression changed slightly.
Not guilt.
Annoyance.
"Seriously?"
"What?"
"You're going to make this weird?"
I almost laughed.
"I'm making it weird?"
Lauren rolled her eyes and reached for the bottle.
"It's sunscreen."
The stranger stepped back.
"Hey, I don't want to get in the middle of anything."
Interesting choice of words.
Lauren immediately turned toward him.
"You're not."
Too quickly.
I noticed that too.
He smiled at her again.
Then he glanced at the bottle.
"Looks like this one works better than the bottle you had yesterday."
Yesterday.
Lauren froze.
It lasted less than a second.
A tiny break in expression.
But marriage teaches you to notice fractions of seconds.
Yesterday.
The day Lauren had told me she spent the afternoon alone by the pool with a book while I was upstairs handling a client call.
The day she'd described later as boring.
I looked slowly from the stranger to my wife.
"What did you just say?"
The man seemed confused.
"The sunscreen?"
I didn't look away from Lauren.
"You saw her yesterday?"
Lauren stood.
"Adam."
I held up one hand.
"Don't."
The man looked between us.
"Yeah. At the pool."
Lauren's jaw tightened.
"It wasn't a big deal."
I finally looked at him.
"How long?"
He hesitated.
I saw the moment he understood that whatever Lauren had told him about me was not matching reality.
"Yesterday?"
"Yes."
He looked uncomfortable now.
"We talked for a while."
Lauren stepped forward.
"Adam, can we not do this here?"
I ignored her.
"How long is a while?"
The stranger rubbed the back of his neck.
"Couple hours, maybe."
The beach seemed to go quiet even though it wasn't.
Children were yelling near the water.
Music came faintly from the resort bar.