Alien and Aliens with the wife. This might be an awkward time to admit this, but I have this software where I can "quickly" edit out the swears and the gore so my wife can stand to watch with me. So she'd never seen either of them before... she still thought Alien was gross. I think she liked Aliens the same way girls like any horror movie: it pushed her buttons and made her jump and scream. It doesn't look like too much fun from the outside... but I'm sure it's what passes for fun.

The scene that scared her the most was in Aliens when the pair of facehuggers come after Ripley and Newt.

It really made me pine for old school Jim Cameron. Just like old school Lucas and Spielbergo.