If her pregnancy is obvious because of her belly then it is not the chronological beginning, it's the chronologically last scene as Nathan suggests... I'll check that scene tonight. I took it as tthe beginning when I saw it but if it turns the other way round I'll be pleased. I agree it will not...
I watched Irreversable last night. I am glad I'd read several things about the film before watching it so that I made some arrangements in order to prevent myself to concentrate deeply. When watching a film if the thought "this is just a film" is on the surface of my mind I'm not deeply affected...