Jasmine Sea by Phillipa Nefri Clark

Danger lurks in the sea... with a storm of the heart and a storm of the sky.
Christie has never been so happy. She adores living in Rivers End and every day her relationship with Martin grows stronger. But a last-minute job in Melbourne puts her back in the sights of the one person she vowed to keep away from, setting in motion a dangerous series of events.
Back home again, she works on the renovations of the stationmaster's cottage and discovers a hidden room whose secrets might heal the old hurts of someone she loves... or reopen past wounds.
When a sudden crime spree affects the town, Christie finds herself at odds with Martin over her safety. Instead of the proposal she hoped for, she's now unsure of their future and loses focus on the danger closing in on her.
In a heart-stopping series of events, Christie comes face to face with her greatest fear... and only one chance to save those she loves.
Jasmine Sea follows on from The Stationmaster's Cottage, with heart-pounding suspense and heartwarming joy. HEA guaranteed and tissues advised.