Marlene/Louis
Marlene had come in a short cocktail dress, but as soon as she was done playing the Head Auror (something that still annoyed her, because politics and having fun were at opposite ends), she went into the pool house. She skipped the bathing suits that they had provided. Instead she went into the bathroom, and changed her knickers and bra in a sexy bathing suit.
She went back to the pool, and not surprising most of the young crowd was here. She slipped into the pool, going underwater, before coming up again. Only then she noticed the blond boy near her. "Hello, darling, how are you?" she said, smiling. "Are you planning to get my boyfriend into another fight with his brother?" she asked, grinning. "If you are, I can point you toward someone else that he's willing to snog you. Patrick is around." She tilted her head toward the other side of the pool. "There, tall, handsome, gay."