A random concept I came up with where Sashenka can become a sort of Half Vampire Half were-wolf hybrid. I figured it would work that if she were to bite you, you would turn into a were but if shes to exchange blood with you then you would turn vamp.
When she turns into this werid hybrid her red markings seem to grow a bit and her fur turns a bit darker.
So far shes only turned one furry into a were and thats Oscar the cheetah.
Enjoy!