Regulus hadn't smiled when Remus had spoken up, although he was tempted. Still he didn't want that girl to have the impression that this wasn't a serious matter. However, before she could say more, Ted spoke up, proving that he had least had been raised as a Black even if he had been polluted by the Weasleys.
He returned the nod. "Ted." He didn't even bother looking at her. Only when they were finally out the door, he covered Remus' hand with his and squeezed gently. They'd have to discuss this in private. For now, they'd keep to more appropriate things like war, murders and politics.