Summer of Secrets — Grace Thompson

  The search for her niece's unknown father leads a woman to a small Welsh village -- and into a web of dangerous secrets . . .
 
Bettrys Hopkyns made a promise to her late parents to watch over her pretty, vivacious, and fragile sister. But as they share a flat in London, she finds Eirlys's drinking binges and moodiness aren't easy to deal with -- in fact, they're taking over Bettrys's life, depriving her of any hope of finding happiness for herself. Then tragedy strikes -- and Bettrys is left to care for Eirlys's daughter, Cheryl.

She also considers herself duty-bound to uncover the identity of her late sister's lover, so the baby can know her father. The search takes Bettrys and her young niece to a close-knit village in west Wales, where they find a community seething with love affairs, disloyalty, and deceit. With trust in short supply, and her own heartbreak to contend with, it soon becomes clear that some find their presence most unwelcome. But what lengths will they go to in order to hide their secrets -- and why?

Previously published under the name Kay Christopher