I recently started up a YouTube channel called CinemAddix. One of our shows is called "Hidden Gems of Cinema" where we highlight underrated, under-seen and under-appreciated films throughout history. Our latest episode focused on "We Need to Talk About Kevin". Check it out and subscribe if you like it! Thanks a lot!
https://www.youtube.com/watch?v=Y1cT5xlRL7I
Good ol' bait and switch there.
But to answer your question, no. Buddy Boy, Murmurs of the Heart, etc... Plenty of mother/son relationships committed to film that are more abnormal.
Ma Mere (2004)
shareWomb (2010). for sure!
The plot is quit interesting in Womb, perhaps more-so than in WNTTAK, which is your typical psychopath film we've seen many times but that's not to say it isn't well shot and well directed. Kevin is a good film but I would have to say I liked Womb more. Although, it may not be a 'mother/son' film per se, it's more of an odd take on the romance genre.
That being said, I would still give Kevin a 6.2 out of 10. It's interesting but not groundbreaking or anything like that, seen too many films about "bad kids" and whatnot. Of course, the subject matter is difficult to accept in Kevin. It's a hard film to watch because you just know it's not going to end well. haha...