becky

I just seen the movie and liked it, gave it a 9 out of 10. I watched it without subtitles and it was a little bit confuzing at the end cuz my englsh is a but rusty.If they knew about the accident and fought about it, she admiting she *beep* up, then why do they see the kid alive? They both see the kid alive but in the end she sais becky is dead. So i don`t know what the father said in the end... he knew she was dead as well?