In the latest claim to emerge about former US president J F Kennedy'senergetic love life, Lisa Lanett, an Austrian-born American, said she had a two-year affair with Kennedy after they met in Phoenix, Arizona, during the Second World War.

Now 87, she has said that Kennedy, then a young and single US navy officer and long before he earned his reputation as a notorious womaniser, had offered to marry her when she became pregnant with their son, Tony, but she had turned him down.

Lanett, who comes from an illegitimate branch of Austria's royal Habsburg family, revealed that JFK paid for the education of their son Tony until he was gunned down in 1963.