Journey into Mystery / Thor Vol 1 #77

Plot

A Hollywood special effects man builds an android to slay a woman who rejected his advances because she was "waiting". After he sends the robot to the museum where she works, he relaxes for a sufficient time, and then is startled when she appears at the door with the robot. She reveals that she too, is a robot, and she was "waiting" for a robot to be a mate. The two machines slowly approach him as he backs towards an open window which he falls through.