A woman has filed a lawsuit against Cyndi Lauper's husband, David Thornton, alleging that the star couple's rapper son, Declyn Lauper, sexually assaulted her. According to court documents obtained by Us Weekly on Tuesday, March 24, the woman alleges that Declyn, 28, sexually assaulted her in a New York City penthouse in November 2020 after she "refused to perform oral sex on him." TMZ was first to report on the filing.