Two weeks before her mother’s death on June 29, 1967, Jayne Marie, then 16, claimed that she had been beaten by her mother’s then-boyfriend, Sam Brody. Her statement to the Los Angeles Police Department the following morning implicated her mother in encouraging the abuse, and days later, a juvenile-court judge awarded temporary custody of Jayne Marie to a great-uncle, W.W. Pigue. Out of Jayne’s five children, only Jayne Marie attended her mother’s funeral on July 3, 1967, because the other children were all under the age of 10.

In 1968, wrongful death lawsuits were filed on behalf of Jayne Marie and Matt Cimber, Jayne’s husband from September 24, 1964 to July 11, 1965 and producer-director of her last film Single Room Furnished, the former for $4.8 million and the latter for $2.7 million.

In 1970, she married Barry Lang in Las Vegas, Nevada; the couple had one son but were later divorced. In March 1979, she declared her plan to write a biography of her mother.

As of 2008, Mansfield is in a long-term relationship and frequently visits her grandchildren.