The scent of her mate's blood on the air combined with his pained growl drove Kitty to dig her own teeth in harder, her jaw locking in place, even as it fell to the ground and rolled. Sharp stones cut into her own hide and she finally let go of the creature with a yip of her own, before gathering herself and scrambling to her feet from just under the edge of it. A quick swipe of its claws caught her across the nose, and she leapt away with a whining growl, then darted around to place herself between the creature and Derek since she wasn't sure how bad his wounds were.
Her ears were back, flat against her head as she lowered herself and growled at the creature while it rolled onto its side, and the instant it did she caught sight of its softer underbelly - and better yet, its throat. Launching herself once again, this time her jaw went for the throat to rip it out, even as her claws slashed and shredded at its stomach, ignoring her own pain thanks to her rage at it hurting her mate.