Laura was flung forwards, bracing with one arm against the ground before pushing off with the inertia and twisting around. She backed up a couple steps, but stood up straight and retracted her claws when she noticed the professor. She almost snarled, upon learning that Xavier and the boy were somehow connected - there wasn't time enough in the day to deal with that sort of thing. Her thoughts reflected her agitation, but her demeanor remained placid. With the subtlest of eye-rolling she turned down the hallway and simply walked off - hands back in her pockets. 

There wasn't a reason for her to be there, the mansion was obviously secure enough for the Prof to simply let random new students float in of their own free will. Potentially endangering other students and staff with their antics. She knew what she smelled, the boy was going to attack. What if it hadn't been her? He was strong, he could've seriously hurt some of the other students. With a pause in the hallway, she bent her head and pinched the bridge of her nose, before brushing her palm across her face and brushing her hair back in one trudging motion.