"Good. You both needed it." That much he knew without even having to know her well. He'd seen it in Ted and it wasn't hard to see how happy finally talking to her son had made Tonks. Remus could certainly be happy for the both of them now that they had a chance to build a relationship. "A specific topic wasn't required, I'm sure. Just getting you two talking would be enough."
It was, perhaps, unlucky for the both of them that the semi-colorblindness that came with his curse prevented him from really noticing the differing shades in her hair, or he might not have pressed the matter, considering it to be something he likely didn't want to think about. Unfortunately, however, without that visual clue, he tilted his head curiously to one side and inquired "Thinking aloud?" before lifting his drink to take another sip.