Royal Prick by Nikki Wild

Gwendolyn
When my royal jerk left for Afghanistan four years ago, I was heartbroken. It wasn’t just Tristan’s hard muscles and sexy grin that got my pulse pounding… He was also a duke—or he would be soon enough…
And now he’s back and hotter than ever… And he wants something from me… Something dangerous. Something scandalous.

Tristan
I have a secret. A shameful secret that started with my birth, one that my father was clear must never get out: I’m my father’s illegitimate son, born from a woman beneath his station. Father has never hesitated to remind me of my “low breeding”, even as he keeps my darkest of secrets.
Now he’s remarried and managed to bring about a real heir, and he’s only too eager to be rid of me once and for all.
There’s only one woman in all the world who can help me now.
Gwendolyn…
And that’s when everything went wrong.