Is 'Mated To My Sister'S Boyfriend' A Romance Novel?

James Anderson lost his future mate and luna, Stephanie, during a rogue attack. Stephanie's death left his entire pack in mourning; her death anniversary was even declared a pack holiday. Five years later, James discovers that Stephanie's younger sister Lily is his mate. But how can that be? Wasn't Stephanie supposed to be his mate? And would his pack even accept Lily as his mate and Luna—many have always blamed Lily for Stephanie's death, because Stephanie died trying to save Lily. For her part, Lily has lived in the shadow of her beautiful older sister for years. She knows very well that pack members and her parents wish that it was Lily that died that day instead of Stephanie. Lily had looked forward to the day that she would meet her mate and finally feel important to someone. Discovering that her mate is James is Lily's worst nightmare, especially when James reacts poorly to the discovery. Lily decides that she is unwilling to live in Stephanie's shadow any longer. She will not spend the rest of her life with a mate who wishes she was someone else. She rejects James, who all too quickly accepts the rejection. Soon afterwards, horrifying truths come out and James immediately regrets letting Lily go. He sets out to get Lily back and right the wrongs that have been done. But is it too late? Will Lily find love with James, or with someone else?

When Aria catches her boyfriend, Kade, cheating with a maid, she shatters their mate bond and runs—only for her broken wolf to spiral into an uncontrollable heat. Lost in instinct and pleasure, Aria wakes the next morning marked and mated… to Kade’s older stepbrother, Damon Rowan. Terrified, she flees, masks her scent, and swears to stay far away from the cold, dangerous Alpha-in-training who now owns her fate. But fate refuses to let her hide. Forced to work closely with Damon, Aria struggles to resist the pull between them—especially when his wolf is already hunting for what’s his. The only problem? Kade doesn’t want to let her go either. Can she keep the truth buried… or will Alpha Damon sniff her out and claim her—only to reject her?

I never wanted a mate. Especially not a possessive Alpha whose every gaze set my skin burning with desire. But the Moon Goddess had a sick sense of humor. Because the one man who was my destined mate? He was my twin sister's mate too. Kayla planned her whole future around finding her mate, and now I was the obstacle standing in her way of happiness. The abomination bond was one problem, but how could I protect my dark secrets when all eyes were now on me? Just one touch, and I had to choose between a once-in-a-lifetime love or letting my twin mark the alpha as hers officially. I was running out of choices, but fate had only begun messing with me

Aurora Everley has always been the overlooked daughter, the one that gets shadowed by her sister Margot. She thought that once she turns eighteen and meets her mate, she would have someone whose attention would just be on her. But she is wrong. Because her mate happens to be the one her sister brings home, introduced as her boyfriend and Alpha Heir, Mason Chase. Now, she has to sacrifice herself again. She has to sever their mate bond, even when her heart screams not to do it. But what happens if someone else is waiting at the sidelines for her? Someone who's been watching her every move, desiring her in ways no one ever did before?

When life situations forces Audrey, a shunned werewolf, who's despised by her step-family to return to her hometown and start all over again, she's met with a shocking revelation: her stepsister's fiancé who is the groom, is the one person she's destined to be with - her true mate.

Nineteen-year-old Adele McAllister has a secret crush on her twenty-six-year-old stepbrother, Killian Black, who was the silver-furred Beta of a hidden werewolf pack. Killian has spent months hiding a secret and suppressing a forbidden-love attraction for the girl he considers to be his stepsister until the night he rescues her from a predatory stranger at a club. The ice between them doesn't just melt; it incinerates, revealing the secret that Killian is a member of an undercover werewolf pack. To save Adele from being killed or having her memories erased by the pack’s iron-fisted Alpha, Killian initiates a mating bond with his stepsister, dragging her into a supernatural world of secrecy and jealousy. As Adele undergoes a series of grueling, trauma-filled trials to prove her worth to the pack, the sexual tension between the "step-siblings" reaches a breaking point. Defying the Alpha’s direct orders, they give in to a night of raw, unprotected sex that strengthens their bond but paints a target on their backs. With a jealous rival seeking to sever their mate bond and a conspiratorial uncle plotting their demise, Killian and Adele must choose to uphold the laws of the pack or burn it all down for a love that was never meant to be.