One of the Good Guys by Araminta Hall

Cole is the perfect husband: a romantic, supportive of his wife, Mel’s career, keen to be a hands-on dad, not a big drinker. A good guy. So when Mel leaves him, he's floored.

She was lucky to be with a man like him. Craving solitude, he accepts a job on the coast and quickly settles into his new life where he meets reclusive artist Lennie. Lennie has made the same move for similar reasons.

She is living in a crumbling cottage on the edge of a nearby cliff. It’s an undeniably scary location, but sometimes you have to face your fears to get past them. As their relationship develops, two young women go missing while on a walk protesting gendered violence, right by where Cole and Lennie live.