I agree this is going a bit far, but it's not exactly a surprise as a lot of modern movies make little effort to represent family values. It's important not to dwell too much on these sorts of things, and instead of merely condemning the movie, how about we pray for those involved that they may know the real Jesus and the plans he has for their lives.
BTW, before going to see any movie, you can get really good reviews written from a Christian perspective at:
http://christiananswers.net/spotlight/home.html
GBL,
Jacques.
In Christ there is no East or West,
In Him no South or North;
But one great fellowship of love
Throughout the whole wide earth.
(W A Dunkerley, 1852-1941)