Forbidden Rider by Jessica Ames

Their love is their secret, and it will destroy them…
The Lost Saxons stole Piper’s future. They took her brother from her, put him on a bike and made him one of their own. Hating them was easy—until she met Jem Harlow. He’s irritating beyond belief, pushy, charming, attractive, and he knows it. And he won’t leave her alone. Worse still, she’s falling for his act. There’s only one problem: her brother does not want her anywhere near his club friends.
For the first time in a long time, a woman has turned Jem’s head. He can’t get Piper off his mind. She’s uptight, difficult, hates his lifestyle, and she’s the little sister of his club brother. He should run far and fast, but Jem’s never been one for following the rules and while he knows she’s forbidden fruit, he just can’t stop himself from taking a bite.
Being together has the power to destroy their family—club and blood—but living without each other will destroy them both. What do you do when loving someone is an unforgivable sin?