Ash had already been at the beverage table. Helping himself to the many samples of cookies, candies and other goodies that were laid out in a pleasing manner across the long table. He noticed another student coming up and realized his opportunity when he recognized them.
He grinned at Cassie as he came up close beside her at the punch bowl, shoulders brushing he was standing so close. "Hey, keep an eye on Mr. Nielsen and Mrs. Lowe..." He said to her in a conspiratorial murmur, glancing at the teachers across the room while he reached into his coat to get his flask.
He was snickering a little as he emptied more than half of it's contents into the dark punch. Quickly he slipped the flask back into his coat with an impressive sleight of hand and then used the ladle to mix it up and pour Cassie a cup. "Thanks." He winked, offering her the now spiked punch.