Stranger on Spaceship Falls For Woman, Kills Husband and Child

by Nicole
(Douglas, Arizona, USA)

I am looking for an '80s or '90s movie set in space where a mother, father and child are in a ship of some sot and a stranger is let in and falls for the woman.

The stranger kills the husband somehow and shuts the child in a compactor which kills him too.

There's a lot of sexual content involved and eventually the woman does kill the man (not sure if he is an alien or a man).

Any thoughts?