Dredge by Lula Monk

Cold. Confused. Sold to the highest bidder.
Samantha awakens to discover she is the property of Galactic Continuity, an intergalactic company specializing in breeding programs for species who are nearing extinction. At the Hub, a strange humanoid creature aggressively bids for her, and wins. Samantha knows what the alien wants, and she’s not relinquishing her body without a fight.
Ruler of the planet Brillar, Dredge is one of the only remaining Glims in the universe. This pale, dull oddity before him — this human — is his species’ best hope for surviving the disease that is wreaking havoc on his planet. There is only one problem — she is non-compliant, combative, and worst of all: she is missing her shine.
When the virus that killed most of his species begins devouring Dredge’s body as well, will he be able to convince the human Samantha to breed before his light dies out?