You know you didn't do anything wrong, so don't worry.
Sadly, smoking marijuana makes you highly paranoid.
I know as I lost a friend of 20 years, because she smoked so much marijuana that she got too paranoid. She decided that my life was really bad, my partner (after 7 years) not good enough for me. Basically she lost the plot.
I don't think you can do drugs AND be a good parent, I'm glad someone reported him. I used to think some drugs were not as bad as others but seeing the effect on my ex-friend, I have changed my mind.
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