He nodded, then cocked his head and smiled quizzically at her. "'Least you can do'? You don't owe me anything."

Although.

Logan didn't seek out other people's secrets, unless he thought they affected him or were likely to affect someone important to him. But he wasn't unobservant, and Una hadn't been exactly as...circumspect about having some association with Logan's nearest neighbor. He didn't know what it meant, but.

If any of this showed, it was only in a faint flicker in his eyes, and the lighter tone in which he added, "Even if you did, it's not like most people care about paying off that kind of balance. I just thought it'd be something to do."