I don't want to abandon her but I feel like I'm not equipped to handle this.
Hi. Welcome.
you are certainly right about that. you are not equipped to handle this. Only she can fix the problem.
what you and your family can do is remember the 3 c's. you didn't cause it. you can't control it. you can't cure it.
It's always extra sad when small children are involved. I'd focus all my attention on the child - on doing whatever it takes to protect him from crack addiction.
That's the only thing you can do to help your sister. If she was sane, that's what she'd want you to do. because no one in their right mind wants their child anywhere near a crack addict.
I think it would be great if you and your family could attend an alanon meeting.
And keep reading and posting here! You'll get lots of insight from people who have been through what you are going through.
but in the meantime hands off the addict. She needs to face this on her own. Addicts don't recover because their families interfere in their addiction. They recover because there is nothing left for them.