Help me find this book pleaseee

[javeria]

The heroine in this book belongs to a religious family. She has one brother. She visits her grand parents yearly. There is a single mom with her son living in the area her grand parents do. Everyone tell the heroine and her brother to stay away from them because they are "evil". I think it's the summer holidays when the heroine is 15 that she stays at her grand parents home for the entire holidays ( a first time) in these holidays she unknowingly meets the single mom and her teen son. The son which is the hero and the heroine spend time together. Hero is 18 I think. Heroine ends up getting pregnant. Her mother is pissed and blames it on the grandparents for not looking out. They want to know who the father is but the heroine doesn't tell because she knows what her parents think about them. But her younger brother rats her out.on the other hand when the hero's mother finds out what he did she slaps him and then tells him that the grandfather of the heroine actually cheated on his wife with her and so the hero is the grand father's son. That is why they are hated. And this is why the heros mother warned the hero away from the heroine as she knows her son is a play boy. Throughout the heroine's pregnancy she writes letter and gives it to the heros mom (she comes visit regularly) to give them to the hero. The mom doesn't given them to her son at all she hides them and tells her son the heroine doesn't want to see him because he ruined her life and she tells the heroine that he didn't want her letters. Then one day when her daughter is a little older the mom brings her son's phot of getting married......Fast forward the heroine's daughter is 6 or 7. She goes missing the heroine and the hero didn't keep touch. Infact the hero gets married. Anyways so her daughter gets kidnapped and it's actually her brother behind this (he became a priest). When her daughter gets kidnapped The hero is actually traveling with his wife and he has a dream of a girl drowning this dream disturbs him a lot and then he finds out it's because his daughter which he has never met is kidnapped.The hero and the heroine reunite to find their daughter and they do. I think their daughter kills her uncle the priest. Please help me find this book