The most beautiful sight in the world was Cassidy’s ass bent over the engine of Diego’s car in his mother’s driveway, her shorts baring her long legs as she stretched to tighten something.

Xavier turned from watching what she was doing and looked up at Diego. “You look terrible,” he said. “Should you be out of bed?”

Diego resisted the urge to scratch his arm in its sling, and he was suddenly aware of every abrasion on his body. The deep claw marks he liked, though, because they represented Cassidy trying to free him.

Cassidy looked over her shoulder at Diego. Grease on a nose had never looked so sexy before.

“I heard your engine ticking when I drove your car back here last night,” she said. “I thought I’d give you a tune-up.”

“She’s amazing.” Xavier gazed at Cassidy with great respect. “She’s working on my truck next.”

“Shifters have learned to be good with cars,” Cassidy said, bending over the engine again. Diego could watch her all day.

Xavier looked from Diego to Cassidy and back again. He wiped off his good hand and tossed down the rag. “Just remembered, I need to go help Mamita with… that thing. You know… that thing… Right.” He turned away and faded into the house.

“He’s transparent,” Cassidy said. She gave whatever bolt she was turning one last twist and straightened. “Want to start it up?”

Diego slid into the driver’s seat, found his keys already in the ignition, and cranked on the engine. The T-Bird purred.

Cassidy gave him a thumbs-up, then slammed the hood closed and snatched up the rag Xavier had dropped. Diego listened to the engine a few more seconds, then shut it off and climbed painfully out of the car.

“You have grease on your nose,” Diego said.

“Oh.” Cassidy swiped at it.

“You’re making it worse. Let me.”

Diego took a handkerchief out of his pocket and put it, plus what was wrapped in it, into Cassidy’s hand. Cassidy started when she felt the weight on her palm and looked at him in surprise.

“Open it,” he said.

Cassidy peeled back the handkerchief, stared at the little velvet box resting in her hand, and then opened it.

The diamonds inside caught on the intense sunshine, throwing little spangles onto Cassidy’s fingers. Her eyes widened. “What is this?”

Diego plucked the ring from the box as she held it and started to slide the ring onto her finger.

Cassidy jerked away. “My hands are dirty.”

“You won’t hurt it.” Diego gently took her hand again. “This is the human way, Cass. Instead of mate-claims, mating frenzy, and mate bonds, we say, Here’s a diamond ring. Will you marry me?”

“Marry.” She looked up at him in near panic. “But Shifters can’t marry…”

Diego slid the ring firmly onto her finger. “I don’t give a damn about human rules. We’ll do this the Shifter way if we have to. You said you wanted to reject my mate-claim, right? Well, I talked to Eric this morning, and he told me that even if a female rejects a mate-claim, the male can make it again. So I’m making it. I’ll keep on making it until you tell me yes.”

Cassidy’s breath caught. “Diego, I told you why I said no. To protect you. So you won’t have to give up your career…”

Diego took her hand and held it. “Listen to me. I talked for a long time with your brother, and then with Mamita and Xav. I can still do my job. If my captain gets bent out of shape because I’m with a Shifter and fires me, Eric has offered to let me become one of his trackers. I can help him out when he has to deal with humans. To be honest, I’ve lost faith in the human system that lets good Shifters be killed and violent drug runners escape without pursuit. Maybe I can do what I’m meant to do, but on the Shifter side instead.”

“But there’s the age difference,” Cassidy said. “I worked the underground in World War Two. Your mom wasn’t even born then.”

“And I want to hear all those great stories. Jace told me this Fionn Cillian he met can do spells or whatever that lengthen a human life to match a Shifter. Maybe I don’t have as many inches as Shifters—yeah, I heard about that—but you can have every single one of mine.”

Cassidy’s look was stunned, as though someone had smacked her between the eyes, and she didn’t yet know how to react.

Diego slid his good arm around her shoulders. “This is something you might understand better. Cassidy Warden, second of Shiftertown, I claim you as mate.”

Her lips parted, as though to deny him again, and Diego kissed her. “Say yes,” he said. “Don’t push me away, Cassidy. I’ll keep coming back until you give me the answer I want.”

Cassidy stared up at him, eyes so deeply green. He loved her eyes, loved her shapely, strong body. All of her.

“Yes,” Cassidy whispered.

She still sounded stunned. “Good.” Diego licked across her lips, her taste making his need clench. “All kinds of good, mi ja.”

Cassidy’s eyes flicked to Shifter. “Stop. If I go into mating frenzy right now, we might not come out for days.”

“You say that like it’s a bad thing.”

Cassidy smiled, her face lighting up in her beautiful way. “I wish you could know what it feels like.”

“I think I do.” Diego leaned closer. “I want you so bad, it’s killing me. With you in those shorts, showing me your hot ass, how can I hold it in? I’d take you bent over this car if I didn’t know that my mom and brother were watching us from the kitchen window.”

Cassidy ran her fingers down his chest. “We need to go somewhere. Now.”

“I have a friend with a cabin up on Mount Charleston. I’ll see if we can borrow it.”

“Hurry.”

Diego laughed and kissed her again. He pulled out his cell phone and called a fellow cop who had given Diego the standing invitation to use his cabin whenever. Cassidy chewing on his earlobe while he talked was distracting, but Diego made the arrangements.

It was dusk by the time they arrived at the cabin down an isolated road off the main highway. Diego’s friend lent out his cabin a lot, so there was a fire already laid in the fireplace, and Diego only had to light the tinder.

Then he and Cassidy were on the rug, Cassidy on top of Diego because of his hurt arm, their clothes scattered all over the place.