A strong part of her wanted to do something to this split contact. Perhaps an unforgivable to put her under her control, or an oblivate- a mind wipe of Mr Nott's existence at all... It was a thought, but she would not, even if the urge rose in her throat before opening the door.
She scowled in her own mind, she'd need to find herself a house elf, or someone else to do such a thing. "Miss Lewis." She said curtly, opening the door further to let her in.