Fenrir chased after Lupin's mate with Natasha at his side. He loped into the room she run to just in time to see a blue light coming towards them. The light hit them and threw them both backwards. He heard the sound of Natasha hitting the wall as he was thrown backwards. He scrabbled against the floor and growled, a low angry sound.
A quick glance showed him that Natasha was either unconscious or winded, either way she wasn't moving for the moment. He snarled at the woman and leapt towards her. Maybe Lupin would appreciate having his mate able to run by his side on the full moon.