Alpha by Annie Nicholas

Someone is about to get some Spice in his life.
Spice returns to Chicago searching for her estranged identical twin, Sugar. Instead, she discovers Eric living in her younger (by six minutes) sister’s house. The once nerd-next-door has grown into the kind man that makes a woman’s knees grow weak…and he’s offering to sleep on the couch so she can stay at the house.
Eric can’t believe Spice has returned. He’d given up hope of ever seeing her again, let alone having her stare at him like a tall glass of water on a hot Sahara day. But he has a secret, he’s the Alpha of Chicago’s werewolf pack. How does he explain that he’s been searching for his mate and he thinks he’s found her?