Purgatory. Dukes of Hell, #2.5

Steff has been the Princess of the Dukes of Hell MC all her life. The only sister and youngest sibling of Kodiak, Viper and Loch, as well as Colt's twin sister. Even the club president, Wrath and his son Satan dote on her. She's adored, on a pedestal. Untouched. Alone. Invisible as a woman. She's the forbidden fruit and the members aren't biting. Ox is the only man who dared to break the rules to be with her.
They are ridiculously in love, even if they rarely get to see each other. His work as a mobile enforcer for Wrath, a literal angel of death, keeps him moving around the country and her schoolwork at Harvard keeps her solidly in one place. That's why they keep their relationship open to casual fun, even though their commitment to each other is anything but casual. Steff didn't know, when she took her roommate to a party at the Boston chapter clubhouse, that the very status that had kept her frustratingly protected was about to make her the target of a deadly former Duke that was hell bent on retribution.
The MC world collides with the Irish mafia and a deranged militia group in this novella detailing the atrocities that would spark a war of rivalry and revenge. Fortune Favors the BraveTrauma trigger warning:This book contains scenes of kidnapping, graphic sexual torment, and assault. Reader discretion is strongly advised.