Expensive by Amy Bellows

All ice dragon shifters have a fated mate. But Andrew was never allowed to find his. At eighteen, he was forced to bond with a rich seventy-year-old man.
Now that man is dead and Andrew is unable to bond to anyone else. He’s never felt so alone.
Timber has worked as a professional Daddy Dom for over ten years when his agent comes to him with an unusual proposition. An omega from New York needs a hired knot, and he’s willing to pay an exorbitant sum. The contract comes with a picture of a beautiful man and a list of demands that are so in line with Timber’s personal interests, it’s uncanny.
At the end of the list is a nervous request:
“I’d like you to call me ‘baby boy.’ If you wouldn’t mind.”
Timber can’t refuse a request like that.