Harry almost fell over into Mandy when he heard his mother's voice, but being used to her brand of sarcasm, he recovered quickly.
"You and Dad are perverts," Harry managed, trying not to let the total relief he felt at his mother's (and therefore the other Auror's) presence here now.
He let go of Mandy briefly and turned to hug his mother - no, being affectionate with your parents at age 15 was not 'cool," but Harry could give a damn less. This was not passing them in the hall, after all.
He nodded at her question, taking hold of Mandy's hand again. "Uh...Mum, this is my girlfriend, Mandy Brocklehurst, and Mandy, this is my mum, Lily Potter."