Her Older Mate

A lonely widow meets a man recovering from a brutal fight. She has known love and life with a wonderful husband. He had mated out of duty, to produce heirs. The love she has for him is great, but will his secret push them apart.
Together, they learn to accept each other's differences as he learns what it means to love, truly love.

If you want to read the rest I have it posted in it's entirety on Inkitt.