'Rebels in the Backlot' comments about his mother?

In the book ‘Rebels in the backlot’ about filmmaking in the 90s, it says that Quentin has been estranged from his mother for many years at the point of writing (written in 2003). I was wondering if anyone knew if this was true, or made up? I always thought of QT as a sort of mamma’s boy guy who looked up to his mum, so I found it quite a sad story that he doesn’t want to talk to her anymore and I came hear to see if anyone knew anything about the truth behind this story.