Sinister Strangers by Paul Moore

Haunted by dark sexual fantasies, the young wife, Keri, is practically immobilized by the obsessive force of her submissive needs. Will her husband, Alan, understand? Can she even confess the truth? Or will her bizarre sexual demands destroy their marriage? The two seem doomed to fail, until ‘that night’, when Keri’s naughty little secret is unwittingly, glaringly exposed and Alan is moved to act. The desperate husband calls in a professional help to handle his unusual situation, but the women he hires have plans of their own. Keri finds a whole open to her. Soon, the unsuspecting couple discovers that there’s more to the ‘mild-mannered’ Alan than either of them realized, as he learns some crucial lessons in satisfying his wife’s desires.