The Paradise Problem by Christina Lauren
I really liked this book for a quick summer read! The main character (Anna Green) marries a very wealthy man (Liam Weston) just to help with housing. She comes from a low income family and struggles to get by. Years later, he needs her help to go to his sister's wedding with him and play the role of wife. Anna signs on, knowing she will be getting paid (after losing her job). They fly to a private island and she sees how exactly wealthy Liam's family is. Liam has many issues with his family (particularly his dad) and tries to protect Anna and keep the peace for the sake of his sister's special trip. As time goes on, Anna and Liam start actually falling for each other and are hiding their secret (that they didn't actually marry for love). Cute, fun read.