Cyndi Lauper’s son can’t stay out of trouble. Declyn Lauper, 26, is being sued for $2 million by a registered nurse, who claims the singer’s only child threatened to shoot him in the head while he was administering an at-home IV, RadarOnline.com can exclusively report. In the lawsuit obtained by this outlet, Ruzdija Basuljevic claimed he reported to Declyn’s New York City residence on December 29, 2023, at approximately 12:30 PM to begin the treatment. Upon entering the apartment, the nurse said he “observed the presence of marijuana and drug paraphernalia.” Basuljevic claimed about 45 minutes…