Free from ARe:
A Mutt in Disguise, by Doris O'Connor
Spoiler:
Love knows no boundaries—or does it?
When Anja is abandoned by her nightmare of a so-called boyfriend, she relies on Mutt to escort her safely home from the homeless shelter she volunteers at. Her canine friend proves to be an excellent listener. If only she could keep the wolf-like dog, but confining him to be a mere pet would be downright cruel.
When she wakes up on her own, after a night full of erotic dreams, Anja doubts her sanity. Dogs don’t change into sexy hunks…
Ethan knows he should keep his distance, especially after the night they shared. Humans can’t be trusted, but Anja smashes through all of his emotional defenses, and his wolf scents his mate.
However, Ethan is in disguise for a reason, and he needs to see this through. Will Anja accept the man he truly is, as easily as she did Mutt?
Short novella, but kind of sweet and cute. And explicit here and there, in case someone wants to know that before they start reading.