Gallowglass (miniseries)

Gallowglass is a British television miniseries adaptation of the Ruth Rendell novel of the same name. It is an emotional story of obsessive love, lust and fear.

Nina and the child are both released when the ransom is paid, and soon after this Sandor jumps to his death into the path of a train as Joe watches. Nina is then lured to her death by Gianni, a former gay partner of Sandor, and her body is found buried in woodland a few days later. Sandors mother, who had no other children, then accepts Joe as her second son, and he begins a relationship with Tilly.

Source: Wikipedia