Richard Mason was left stunned when he discovered the three boys were not his after doctors told him he has a medical condition that makes him infertile since birth.
The shock news came two years ago when the 55-year-old was diagnosed with cystic fibrosis, an hereditary disease which prevents male sufferers from fathering children naturally and DNA tests confirmed beyond doubt that he had no biological link to his eldest son, now 23, and his 19-year-old twins.
Mason believes his ex-wife, Kate had an affair with a work colleague in the late 1990s, the man is thought to have fathered all three boys during an on/off four-year affair.
Kate only confessed to the adultery in 2016, ten years on from their divorce, when he confronted her about the children’s paternity but won’t reveal the identity of the children’s real father other than to admit he was a member of Barclays' staff and they met up in a London hotel from time to time when she attended events as a union official.
Mason, who is now happily remarried have won a £250,000 refund from the £4 million divorce settlement he paid his ex-wife.