Intergalactic Slavemasters II: Krull by Kaitlyn O'Connor

Maggie is naturally terrified when she's yanked from her pod and discovers she's been taken--surrounded by aliens--and trained as a sex slave by the slave masters, the Shibae.

When Krull offers to buy her freedom if she'll accept him as her man, she's inclined to take the offer.

Until she discovers what the Tyrean actually are--absolutely terrifying creatures that can shift from man-like to beast almost in the blink of an eye.

But who's the real monsters? The slavers, the Shibae who helped to wipe out Krull's people, stole her from her home and made her a sex slave? Or the Tyreans--who prove they're as capable of gentleness and generosity as they are of wreaking total annihilation on their enemies?

Multiple heroes--woman with male harem. Shape-shifters.