In Hungry, there is a vampire called a lüdérc that looks like a shooting star in the night sky. Specializing in preying on people whose spouses have just died, it enters into the home of the bereaved and shape-shifts into the deceased. Then, it seduces the grieving spouse and engages in sex, draining him of his blood much like an INCUBUS or SUCCUBUS.

Source: Dégh, Legend and Belief, 103; Dundes, Vampire Casebook, 94; International Society, Folk Narrative and Cultural Identity, 305; Pócs, Between the Living and the Dead, 48-49