A film I woke up to one night on HBO.

[Joe the Destroyer]

I remember seeing the very end of this odd flick, and I'll try to retell what I remember.

There was a woman running around looking for her husband or boyfriend outside in the dead of night.  All the while, you hear this roaring and crashing in the distance (at least that's what it sounded like).  She bumps into some guys who were obviously earlier in the movie and they are pretty well torn up and dying.  After a while they cut to the husband/boyfriend and he's being seduced by this woman, and they wind up having sex.  While she's riding him, she starts killing him in some way or another; it looked like she was crushing his chest or something.

The woman finds the two of them, somehow snaps her hubby/bf out of it, and they defeat the "demonic" woman.  After this, there is a scene where the couple is in bed and they pretty much say to each other that it's all done with for good.  The camera then pans over to a magazine with a woman on the cover and you hear the roaring and crashing again.

I honestly cannot recall what movie this was...

[LilCerberus]

Sota sounds like Night Angel
http://www.imdb.com/title/tt0100247/

[Trevor]

I agree with LilCerberus, it is Night Angel with the scrummy Isa Anderson as the title "demon", almost always dressed in negligees and sexy lingerie.  That film gave me nightmares for days. 

[Joe the Destroyer]

Yes!  Night Angel is it.  I knew it was "something angel," and for some reason I kept thining Earth Angel, but that's a classic song.  Thanks!

[Dave M]

The cast list is cracking me up