Tybalt hadn't expected to run into his old friend Dunsinane in Hogsmeade, and so he had waved Serenus on to the bookstore while he stopped to exchange Floo addresses. Then Dunny had had to admire the boys, of course, and so by the time they parted it had been a few minutes, and Tybalt walked quickly toward the shop, opening the door and pushing the stroller ahead of him.
He had barely stepped inside when he spotted Serenus, his chin tilted up and regal nose in the air as though he had scented something bad. He approached his husband, head cocked to one side, then leaned down to nuzzle Serenus' cheek affectionately. "What's got your Snape up, love? Did they relegate all the Alchemy books to the Muggle section or something?"