James nearly choked on laughter at Al's jab at Scorpius. He'd known his grandson long enough to guess that he hadn't really meant that entirely the way it came out, and probably still hadn't any idea just how suggestive it had sounded.
A responsible grandfather probably shouldn't be the one to enlighten his grandson about such things.
"Lils?" he said instead. "Care to show this poor, deprived boy how it's done? I'd trust your chocolate-making skills over mine any day." After all, he'd grown up in a home not totally unlike Scorpius's. Lily was the potioneer between them, and hence also the chef. He could probably manage hot chocolate without burning the kitchen down, but Lily's was better.
Meanwhile he watched Al's performance with the cream, eyebrows raised approvingly. "Now that's creative use of Charms."