Her Deadly Promise by Carla Kovach

Four-year-old Kayden has been sitting alone on the little patch of tired grass outside his house for hours. His cheeks are wet with tears as he waits for his mother’s warm embrace. But she’ll never arrive to pick up her darling boy. She’ll never be seen again…

Church Road is a quiet corner of suburbia where happy families play in the local park and neighbours smile as they pass in the street. But behind the bright red door of number 8 lies the body of Billie Reeves, a young mum who just took her last breath.
Serena is Billie’s sister. When she found out her boyfriend had been obsessively calling Billie, she’d all but cut her from her life. But not before vowing she would make Billie pay for ruining her relationship…
Shaun is Billie’s ex-boyfriend. He left her the moment she fell pregnant. When he turned up at Billie’s door, demanding to see Kayden, she refused to take the risk of him hurting her precious son. He’ll do whatever it takes to get his little boy back…
Nadia is Billie’s best friend. Their kids attended the same school and Billie often opened up to Nadia about her struggles as a single mother. She knows Billie’s deepest, darkest secret. She promised never to tell, but that was before the argument…

When police investigate the quiet little street, they discover everyone was whispering about Billie’s late-night callers. What was going on behind the closed door of Billie’s small home? And if someone was prepared to kill her, what do they know, and who will be next?