Lopez, Angelina M. Milagro Street series.

"The first time she left Freedom, Kansas, behind, she did it by doing everything right. This time, she'll hide from the large Mexican American family welcoming her home and work in secret to break the curse that's erased her magical life. Only by doing it all wrong can Gillian get herself and her two children away from the ghosts of her hometown by summer's end. Nicky Mendoza is an answer to her prayers. He was the practical solution to the problem of her virginity when they were younger, and now, as a gorgeous artist in town for only a weekend, he's the ideal man to launch her down the path of ruination. But Gillian isn't the only one who's cursed. Nicky has been plagued by his furtive, enduring love for her as long as he's been haunted by his cadejo, the phantom black dog that stalks his psyche. He'll stick around to be whatever Gillian needs him to be this summer--but he won't touch her. Touching her, then watching her leave again, would ruin him for good"--