Tales from the Crypt

Clyde is a fugitive who holes up in a house occupied by an elderly woman. One night he finds an attractive woman upstairs, but he discovers it's the same woman. She tells him that a long time ago her spouse caught her having an affair and put a curse on the house. She must stay up stairs if she wants to be young forever. The same thing will happen to the man if he comes upstairs. The cops arrive and he goes upstairs to change his image but he finds himself getting weak and the woman turns back into a helpless infant unable to do anything but crawl.