Ada wouldn't have realised it was her until she saw the creature turn back in the light of the full moon. A face so identical that she could almost feel it was her form having been changed. She felt the pain of the transformation flash past her like a knife and staggered back. How could she not have seen what Agatha was? The snarl on her face was the last vestige of werewolf and it frightened Ada that she was capable of it. What hurt the most was that she'd not felt that anything had been wrong the day that it had happened. Their twin connection had been lost over time and she could no longer feel a twinge that signalled that her sister was in trouble. She told herself that she couldn't help it, nobody asked to be bitten by Fenrir Greyback. But the thought repulsed her and Agatha knew it.

'Care to join me, sister?'

Ada shook her head, not trusting herself to speak, trying to control the tears that pricked at her eyes.

'Don't look at me like that. I don't need your pity' Agatha spat out. 'I have power you'll never have.'

'You can't want to be this depraved.'

'I've survived Azkaban. There's nothing I can't do now.'

Ada scrutinised her sister and noticed how dead behind the eyes she was. Like a shuttered window. She'd never been like that, not even at her worst. Her hands started trembling as she felt the fear creep up on her, more so when she saw Agatha's sneer. She could scent terror and Ada couldn't conceal anything from her anymore.

'I won't let you leave here without a significant change to your person. You can join me under the full moon or you can lie here dead. You choose.'

'Look what they've done to you. I don't even recognise you anymore. You're past the point of no return.'

'Decide quickly, dear sister or I shall decide for you.'

A soft footstep to the left turned their heads. Ada couldn't believe what she was seeing. Agatha's laugh was cruel and shrill.

'I should have realised your lapdog would be lurking somewhere. Although I don't think much of her approach.'

Hecate Hardbroom was standing there wielding a filthy muggle invention with menace.

'You can't be serious' snarled Agatha.

'Hecate what are you doing with that thing?' Hissed Ada.

'I hope you like the taste of metal' warned Hecate, stepping closer. She kept her eyes trained on Agatha, aiming firmly at her heart.

'How dramatic.'

Hecate shifted the gun higher up in response. Ada was frozen in shock. Where had she got it from?

'I never thought I'd see the day that Hecate Hardbroom would turn muggle.'

Ada hated that her sister had been keeping tabs on her.

'Sometimes muggles have their uses' observed Hecate. Her tone was dangerous.

'Clumsy and obvious, all of them' replied Agatha. 'You don't suit such an object. But you might suit being a beautiful black wolf. I think it would be the making of you. Perhaps I'll take you to play with instead and get rid of my sister for good.'

She bared her teeth and started to transform to her beastly shape. They both watched in horror and fascination as the grey wolf reappeared. She growled and Ada stumbled back in terror.

Hecate's response was to pull the trigger to the echo of Ada's shriek. The resulting silence lay thick and heavy over them.

When the dust had cleared, they saw what a perfect aim Hecate had. One shot to the head and the beast lay in the grass, never to open her eyes again.

Ada looked over at her deputy who had finally lowered the gun.

'Where did you get that thing from?!' Ada screamed in distress.

'A gypsy.' Hecate replied calmly, though her hands shook. She didn't elaborate further. She emptied it and displayed the gleam of the contents in her palm.

'Silver bullets. They are said to be able to kill a werewolf. I had to take the chance that they would.'

She gave Ada a minute to crouch by the body of her sister to whisper goodbye, the underserved tears soaking into her ragged fur.

'I don't like this thing but I'd use every time if I had to. I'm not your partner for nothing, Ada.'

She slotted the bullets back in and started striding back.

'And I thank you for it' whispered Ada, knowing that it carried on the wind to stream into Hecate's ear. She ran to join her and they left that cursed field for good.