Showing Tall, Dark and Deadly by Margaret L. Carter

When horror actor Claude Darvell agrees to produce and star in novelist Eloise Kern's vampire movie script, they feel a powerful attraction upon their first meeting. Eloise doesn't suspect that Claude is a real vampire, using his film roles as "hide in plain sight" camouflage...until the ecstatic "dreams" she enjoys under his roof become too vivid to ignore.