Oh hell yea. You bitch loud enough, Wal Mart will take back anything. :p

Fragile by Jaume Balagueró
http://imdb.com/title/tt0422272/

I have ONE reccomendation for your mother, and I am 100% sure that she will love it. It fits everything you listed spot-on, EVERYTHING. I cannot stress this enough - both of you, sit down together, and watch it. It's severly underrated.

A heart-warming ghost story with stylish direction, and intelligent writing. A twist that you will not see coming... and of course, even if it leaves you with a smile on your face and a tear in your eye... it still packs a level of tension and fear throughout the film that is essential to all horror films.

Rated PG-13 for intense sequences of terror/violence, and some thematic elements.

You will not regret renting this movie for you, or your mother. It's excellent.

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Try: The Others and Kairo (not the American 'Pulse' - even though I did enjoy that as well)

Crabs was spot on with B.O.F. and Horror of Dracula.

Horror Express, Children of the Corn, The Body Snatcher (1945), Night of the Living Dead, and Suspiria are others you and her may enjoy.

Ooh! I know! The Fog (1979) would be perfect! No sex, minimal profanity (if any) and plenty of creepy ghost-slasher excitement and chilling atmosphere!

Horror Express
Let's Scar Jessica to Death
Frankenstein Must be Destroyed
The Watcher in the Woods
Willard
The Creeping Flesh
Arachnophobia
The Prophecy (it doesn't battle religion but does work with it)
Fallen
Sleepy Hollow
The Gate

I'm thinking

The Gate
Kairo
Suspiria

(We've seen most of the rest, thanks a lot guys.)

I'll look into fragile too.

I thought Suspiria had some nudity...

None that I recall...

Yes, absolutely, I agree:

The Fog
Watcher in the Woods

Both very scary films that feature no nudity, very little onscreen violence or none at all, and no really overt swearing.

And Watcher in the Woods--especially being a Disney film!--it is nice to see this film mentioned on HDC because it is one of John Hough's better movies. This was before Touchstone Pictures was created (allowing a Disney offshoot to tackle R-rated productions), and Disney Studios had this strange notion to make a REALLY SCARY PG-rated movie with supernatural/paranormal elements. Talk about an extremely intense and unnerving film! Once again, here's proof that you don't need chainsaws and blood to scare the crap out of your audience.

There are some VERY good PG and PG-13 horror movies out there like Poltergeist, Let's Scare Jessica to Death, and Watcher in the Woods. We all want less PG-13 horror movies but instead we should be asking for GOOD horror movies instead.

Pit and the Pendulum