Mark Gastineau fathered a son with Brigitte Nielsen and kept it secret from his daughter, Brittny, for 20 years
Nielsen, who was briefly married to Sylvester Stallone after appearing with him in "Rocky IV" (1985), had an affair with the Jets' leading quarterback-sacker in 1988. But the Danish beauty then moved back to Europe, where she starred on Italian TV and made a string of low-budget films.
Brittny said she had heard rumors, but never knew her brother existed until her mother, Lisa, bumped into Nielsen at Ivana Trump's wedding last April.
"Brigitte literally said..