They'd known each other twenty years. Long enough that Margot could say "you used to—" and mean it as geography, not accusation.
"You used to turn things over," she said. They were walking the path behind the reservoir, the one that loops back without announcing it. "That paper you published on pediatric dosing. You sat with it for a year after it came out, still picking at whether the confidence interval was honest."
Lena smiled. "I remember the paper."
"You were bothered by it. Not because anything was wrong. Because you couldn't be sure your certainty wasn't premature."
"That sounds exhausting."
Margot glanced at her. The response had come easily—too easily, like a door that swings open because nothing's behind it.
"It wasn't exhausting at the time. You said it felt like breathing."
"People say all kinds of things about their younger selves."
They walked. The path curved. Margot had expected resistance—no, I still do that, or you're right, I should get back to it. Some acknowledgment of a before and after. Instead: nothing. Not denial. Not defensiveness. Just a smooth surface where the handhold used to be.
"Do you still read Keisha's column?" Margot tried.
"Sometimes. When it crosses my feed."
"She challenged your framing last spring. The one about adjusted outcomes."
"I saw that. She made a fair point."
"And?"
"And I incorporated it. Updated the next draft."
Margot stopped walking. Lena took two more steps before noticing, then turned.
"What?"
"You incorporated it."
"Yes?"
"You didn't sit with it. You didn't call me at eleven saying what if she's right and the whole frame is wrong. You read it, agreed, and moved on."
Lena looked genuinely puzzled. "Isn't that... mature?"
And Margot didn't know how to say: the thing that made you good at what you did was that you couldn't do that. The sitting-with was the engine. The doubt at eleven wasn't weakness leaking out; it was the work happening. When you incorporated Keisha's point in an afternoon, you didn't become more efficient. You became someone who doesn't check the check.
But she couldn't say it, because Lena would hear a compliment wrapped in a complaint, and respond to the complaint.
"Maybe you're right," Margot said. They started walking again.
Later, at home, she tried to locate when it had changed. Not a date. A quality. Something had become sufficient—some answer, some confidence, some tiredness that wore the same clothes as peace. And the part of Lena that would have noticed was the first thing it replaced.