well she knows everything but wont be home when i do it. hm..i hope they dont charge her with sth
Like another poster said, it depends on your jurisdiction. But in general, there is no positive legal obligation to help. Even if you have a fire extinguisher in your hands and could easily put out a car fire, and you do nothing, you would not be held legally liable for the death of someone in the car. Rather horrible, but the law is pretty clear on that, here in Canada, and I'm pretty sure in the USA. (I think there have been a couple laws about being required to give assistance in some situations, but I've never heard of suicide prevention as a legal obligation.)
"Counseling suicide" is illegal here and other places, but that generally means bullying someone into it, or at least encouraging it. Your mom will almost certainly be able to say she didn't think you were serious, if it were even prosecuted. Make sure there's no whiff that she actually bought anything for your to help you do it, or of course that she might have been there to physically help, and very likely she'll be in the clear.
Of course, I am not a lawyer. Normally I'd say you should talk to one, but this is one of the rare cases where they can break attorney-client privilege and report your intentions.
