No Mortal Business — Barbara Geiger

Less than a week ago, Finn traded away the rest of his supernaturally long life for two weeks with his boyfriend Devon. Finn is a shapeshifting seal straight out of an Irish folktale who had to give his heart to a cruel master a decade ago. Devon may be the boy next door, but his stepmother is a witch who thinks she can break Finn's contract. Finn's master, Paul, though, isn't going to give up easily on the near-immortal life a selkie's heart grants him.

The more time Finn spends in Devon's lavish care, the more he remembers that sex was meant for pleasure. Finn wants the sting of a riding crop and something shiny around his neck as a token of Devon's affection. He can't go back to Paul's sexual servitude now. With Finn's new resolve comes magical powers that he's going to need, because the stakes for Paul are higher than Finn realizes. The deal that binds Finn is backed by the powers of a sea witch with the strength of the Pacific Ocean. If Finn is late, Paul will make sure he can never swim in open water again, and if he runs, he's dead.