Series numeration from FantasticFiction.

"As an ungainly demon boy, Abyssian "Sian" Infernas had his heart shattered by a treacherous fey beauty. When he grew into a breathtaking demon, Sian fantasized about seducing and spurning her, but she died before he could exact vengeance. Millennia later, a curse has amplified his hell-demon blood, transforming him into an unrecognizable monster--just as she's been reincarnated. He can retain his former appearance for only one hour a day. When Gabrielle "Brie" Barbot inexplicably stops aging, her acting fame becomes a nightmare. Her unique look--that kept her from landing serious roles--forces her into hiding. She has no idea supernatural beings exist until the night a beastly demon enslaves her. Calling her a fey immortal and vowing revenge for betrayals she can't remember, the beast punishes her with grueling labor within his mystical castle. Her only solace is spending time with fellow prisoner Dominick, a devastatingly gorgeous male who is allowed to see her for only one hour a day." -- Provided by publisher.