Wicked Crush by Jenna Kent

Riley

She doesn't realize everything I've done is for her. My fortune, my authority, the clout I wield; it's all for Mila Wilson, the woman I've loved for a decade. A decade past I was an ass to her in college, especially when she broke my heart, unaware of the social issues that plagued me then. These years without her have been agony—longing to feel her body against mine, but this time for keeps. She recognized something in me no one else did and gave me unconditional love only to be pushed away by me. Unknown to her, I spent these ten years arranging our forever, and now on her twenty-eighth birthday, it's time to put my plan into motion. One date is all I need—to get her through the entrance of our forever home; the home built just for her where she will never leave my side.

Mila

I hadn't seen Riley Thorne in years. We had broken up when I was eighteen; her bullying behavior had just become too much for me. And I had paid for it. She proceeded to bully me incessantly, driving me close to madness, until one day the torment abruptly stopped. Her disappearance was like a breath of fresh air. But now she was back—more surprisingly she was filthy rich; a billionaire, even—and she was blackmailing me into a date on the eve of my twenty-eighth birthday. To make matters worse, she trapped me in her beautiful mansion, insisting that this was now my home and there was no escape from her clutches. She said she'd keep me forever.

J