Going Down By Jayne Lockwood

Book 1 of the Switchblade Romance series. Can be read as a standalone novel.
“I break balls, rip hearts to shreds and fuck like a demon, but I don't do love. Never forget that."

Office worker Tino Santini is dismayed at being trapped overnight in an elevator with his firm’s fearsome CEO. When awkward small talk turns into a sex and booze marathon, Tino hopes his stalled career is about to get a power boost.

With a mobster past and a savage temper, Richard Mason has no time for love, yet nothing has prepared him for Tino Santini. Now that smart-mouthed, beautiful man is about to throw Richard’s tightly controlled world upside down.

Neither Richard nor Tino expect their affair to be anything other than business, until a personal tragedy throws them together. As they enjoy a hedonistic journey of of discovery, trouble with a business rival looms on the horizon, bringing mayhem and murder.