She'd almost forgotten that company was coming and that she'd thought about asking Angel to drop her off some tea because she thought she'd seen somewhere that Helen was British and the only other British person she knew - Wesley - liked tea and maybe this woman did too...but she'd forgotten that as well. When the knock came, Fred was startled out of writing a random theory on one wall, and glanced over towards the door, suddenly terrified. After a moment, she vaguely remembered that Helen was supposed to be coming, and frowned when she remembered she didn't have any tea. Hopefully Helen would be okay with that. Slowly, Fred stepped out of her bedroom while capping her marker, than made her way to the door itself.
If she'd known where the other woman's thoughts were right now, specifically on science and magic and their connections, Fred would have been happy because most of her theories centered around that - as did her past experiences. But since she wasn't a mind reader, she opened the door slowly and blinked at Helen, then offered a nervous smile.