Dora found herself actually worrying when Natasha lowered her lips towards her skin. Of course it was battle, and there was a good deal to be worried about, but while she knew that her body would eventually get over the effects of Crucio, the effects of a bite would last forever even if Natasha was in human form.
She'd always told Remus that she'd not mind being bitten, but it was always a bit different when the possibility was staring you in the eye. She didn't see Remus approaching, didn't know that help was on its way when she reached up with her one free arm and struck out to backhand the woman across her face. Anything to make her lose balance and momentum.
It was surprise and relief that swept over her features when she saw her husband running towards her.