Talk:Vara/@comment-70.68.221.255-20180128155932

Considering the nature of the house and how Jakob's twisted perception turned Marta into something resembling a Bruxae it's possible Vara was never a succubus to begin with but a woman cursed to be alone most likely by someone whose love she stole and possibly led to ruin like Marta cursed Jakob and altered by the perception of whoever cursed her just as Marta was by Jakob. Amongst other physical irregularities to normal succubi Vara was unable to defend herself from the leshen. As Geralt himself noted in the story succubi possess considerable magic Power they can use to defend themselves and can wield fire in particular which could have made short work of the leshen. Vara seems pathologically compelled to near-fatal trickery but would still have defended herself if she could have. If Vara is the way she is because of a curse she might be afraid to leave because for all she knows the curse is the only thing that sustains her and Geralt's parting remark was telling her she was the only thing keeping herself there.

That's my guess, at least.