When Hermione walked in Lily scooted in behind her holding a hand on the door for a quick escape. There was a small, very small, part of here that somewhat felt bad for lying. She blamed Al for that. But the bigger part of her that was all prankster Weasley was rather proud with how well this all worked out.
She offered Hermione a grin and a bit of a shrug. "Really Hermione, I am a Weasley," was the only explanation she gave for the trickery. "Bye!" She said quickly and snuck out of the closet, charming the door to stay well and closed behind her. She didn't leave quiet yet, waiting for her Mum to come by and put something a little stronger on the door.