The story of Susan O’Donnell’s life is neither inspiring nor allegorical. If anything, it is a cautionary tale, one that warns of what can happen when you enmesh technology with suburbia. O’Donnell, the central character in Andrea Mara’s new domestic thriller It Should Have Been You, is a secondary school teacher on maternity leave, her daughter Bella gently cooing between the successive mysteries erupting in their lives. They, along with Bella’s father and Susan’s husband Jon, live at 26 Oakpark, a nondescript housing estate in an undisclosed area of South Dublin. We soon find that Susan has an equal but parallel life…