The Kindred (1987)

Director: Stephen Carpenter, Jeffrey Obrow
Cast: Amanda Pays, David Allen Brooks, Julia Montgomery, Kim Hunter, Peter Frechette, Rod Steiger, Talia Balsam, Timothy Gibbs

Synopsis:

Amanda’s deathbed request to her son, John, was for him to destroy all the lab notes etc. from her last experiment. She also blurts out he had a brother. At the funeral John meets Melissa, who claims to be his mother’s biggest fan. Together with some of John’s friends they go to Amanda’s house, but none are prepared for what they find there.