Hey - Addicted to Speed:
Just wanted to let you know that sometimes adults make mistakes. PrincessKsMom realized and apoligized for it so no harm done
Sometimes adults do what is called "Open mouth - Insert foot". You can start practicing now, cause you'll do it as an adult too, I can assure you of that.
I'm very sorry if it is you in that situation you described. Or even if you know someone in that situation.
Most Mom's would NEVER want to hurt their children. Most of us would rather die than see you guys hurtin. Quite possibly the mom you are referring to had some type of psychological/stress/emotional exhaustion problem that contributed to all those things you describe. Some mom's do have issues like this. This does not mean that she is not guilty for some things,she may very well be. Mom's make mistakes too

One of the hardest things I ever did in my life was quit smoking. It is an addiction worse than heroin. Don't EVER smoke a butt.
Eating & smoking may have been her "feel good" from the stress, you may even feel she put those things first, but sometimes the brain plays tricks that I can not even begin to explain to you. Since you have not experienced adult stress yet- it may be hard for you to understand.
So could it contribute? - Yes and no.
I hope I made some sense - I just wanted to try to answer you, and I am sure there are people MUCH better/ more qualified than I that can help you.

Stay a kid as long as possible.