Petunia stopped her swing by dragging the heels of her sandals on the ground, making a crunching, grinding sound, then leapt up, hands on hips.
“Mummy said you weren’t allowed, Lily!”
“But I’m fine,” said Lily, still giggling. “Tuney, look at this. Watch what I can do.”
Petunia glanced around. The playground was deserted apart from themselves and, though the girls did not know it, Snape. Lily had picked up a fallen flower from the bush behind which Snape lurked. Petunia advanced, evidently torn between curiosity and disapproval. Lily waited until Petunia was near enough to have a clear view, then held out her palm. The flower sat there, opening and closing its petals, like some bizarre, many-lipped oyster.
“Stop it!” shrieked Petunia.
“It’s not hurting you,” said Lily, but she closed her hand on the blossom and threw it back to the ground.
“It’s not right,” said Petunia, but her eyes had followed the flower’s flight to the ground and lingered upon it. “How do you do it?” she added, and there was definite longing in her voice.
“It’s obvious, isn’t it?” Snape could no longer contain himself, but had jumped out from behind the bushes. Petunia shrieked and ran backward toward the swings, but Lily, though clearly startled, remained where she was. Snape seemed to regret his appearance. A dull flush of color mounted the sallow cheeks as he looked at Lily.
“What’s obvious?” asked Lily.
Snape had an air of nervous excitement. With a glance at the distant Petunia, now hovering beside the swings, he lowered his voice and said, “I know what you are.”
“What do you mean?”
“You’re… you’re a witch,” whispered Snape.
She looked affronted.
“That’s not a very nice thing to say to somebody!”
She turned, nose in the air, and marched off toward her sister.
“No!” said Snape. He was highly colored now, and Harry wondered why he did not take off the ridiculously large coat, unless it was because he did not want to reveal the smock beneath it. He flapped after the girls, looking ludicrously batlike, like his older self.
The sisters considered him, united in disapproval, both holding on to one of the swing poles, as though it was the safe place in tag.
“You are,” said Snape to Lily. “You are a witch. I’ve been watching you for a while. But there’s nothing wrong with that. My mum’s one, and I’m a wizard.”