Stalked by the Kraken

Rose runs her family's Love Bathhouse, where clients pay for private rooms with the magic generated during "heated acts," magic the bathhouse then bottles and sells as currency.

When the ancient kraken-shifter Gideon comes looking for a stolen artifact, he ends up watching Rose instead, and proposes a straightforward sexual arrangement rather than a relationship, correctly guessing she's too recently burned to want anything else.

What starts as a transaction between a matchmaking witch and an immortal sea monster turns into the first book of Lillian Lark's Monstrous Matches series, playing the "no strings" premise for both heat and tenderness.