My Stepmother Is an Alien

In "My Stepmother Is an Alien" (1988), an alien woman named Celeste is sent to Earth to study the planet but finds herself falling in love with a scientist named Steven Mills. As Celeste navigates human emotions and customs, she must also contend with the suspicions of Steven's daughter Jessie and an evil scientist named Lucas. The movie follows the comedic misadventures and challenges faced by Celeste as she tries to fit into human society while keeping her true identity a secret.