Sil telling me I'm the only person who can help my ex sort his life out. I feel so hurt and betrayed.

[YoJesse]

Long back story, sorry.

Both me and my H (separated) have a history of drug and alcohol abuse. After his behaviour became more erratic and abusive I got to the stage where I finally started sorting my own problems out with therapy etc and we split up. It was a messy separation and I fucked up a few times in the process.

I guess I reached my lowest point when our ds 3 went to live with my mum. I realised at this point that at the time this was for the best and was in full agreement with that plan. I have been completely clean, sober and NC with my ex for over 7 weeks now and I think one of the main reasons I've been able to achieve this is because of being NC with him. I'm due to move in with my Mum later this month.

I've always viewed my sil as a friend first and an inlaw second. She has been really supportive and a genuine close friend. Since our split she has kept me up to date with how my ex is doing and has been in regular contact with both of us. She (until now) has been 100% behind me splitting with him and when we were together used to tell me that I should leave if things get worse etc. However I can totally see, since having therapy that she is massively an enabler. I got a really long email from her last night basically telling me that ex h is in a bad way and the only person able to pull him out of it is me. She hinted, without saying anything outright that he is using harder drugs and more often. I get that he's her brother and she must be hurting to see him spiralling down but I feel so angry and hurt that she's suggesting I'm somehow responsible for this and should be doing more to help. She knows, as I've told her that although I'm physically detached from him, mentally I haven't at all and if it wasn't for the very real risk of losing my ds I'd be there trying to help. I think she's exploiting this and manipulating me. She's always been such a good friend and after losing touch with most of my close friends I don't want to lose her too but I'm really hurt by this.
What should I email back to her?
(by the way, there is absolutely no way I am going to stop being NC with Ex)

[Lunar1]

Congratulations Jesse, you are doing so well. To be honest you are better off without anyone around you who does any kind of drugs. Really pleased you are turning things around.