The Paradise Problem by Christina Lauren

Anna Green thought she was marrying Liam 'West' Weston for access to subsidized family housing while at UCLA. She also thought she'd signed divorce papers when the graduation caps were tossed, and they both went on their merry ways. Three years later, Anna is a starving artist living paycheck to paycheck while West is a Stanford professor. He may be one of four heirs to the Weston Foods conglomerate, but he has little interest in working for the heartless corporation his family built from the ground up. He is interested, however, in his one-hundred-million-dollar inheritance. There's just one catch.