The Girl In A Swing by Richard Adams

A reserved English ceramics dealer impulsively marries an enigmatic German woman who refuses to discuss her past, and their seemingly idyllic, erotic union is soon invaded by eerie visions, unexplained sounds, and a growing religious dread. As hints of a buried wrongdoing—centered on a child—surface, the couple’s happiness unravels beneath mounting supernatural phenomena and guilt, culminating in a devastating revelation about love, secrecy, and the inescapable consequences of moral transgression.