I've read this series, I gave it a 4 rating.
Please double check, this is supposed to be free but geo-restricted at time of post:
Arouse by Nina Lane. it does show
free at Kobo.
blurb:He is Professor Dean West, a sexy, brilliant scholar of medieval history and the love of my life. He is my white knight, my lover, my best friend, the keeper of my dark secrets. He taught me the meaning of both love and erotic pleasure. He has slayed monsters for me and alongside me. He knows he has all of me.
And then...I discover that I don't have all of him.