In Retribution by Courtney W. Dixon

One night of lust could turn into an eternity of love. But desperation for vengeance could destroy their chance at happiness.
After a life of poverty and abandonment, Charles Nolan sought normalcy and stability. He controlled every aspect of his life with fine-tuned precision. Everything was orderly. Everything had its place. Then entered a man, during a one-night stand, who shattered his carefully constructed walls and heart with little effort. But there was a darkness surrounding him, bringing out Charlie’s own pain. Could Charlie get over his past? Could he allow this man to get close without crushing his soul? Or will his fears of abandonment take hold?
Brady O’Callaghan survived his father’s abuse, the man who ruled the Irish mob with an iron fist. But that didn’t compare to the loss of his lover. Suffering from grief and PTSD, he lived as an empty shell, alone, until Charlie danced his way into his life. Finally, Brady saw the light at the end of the tunnel. A glimmer of hope. Could he push past his grief and find love again? Would his enemies take away someone he cared about once more? Would he finally get his retribution?
CW: PTSD, grief, homophobia, mention of child molestation, explicit language, violence, sex.