Dreading my brothers release from prison - From 'Rachel'

Hi there Prison Widow UK.

I don't know what to do. It should be the easiest decision I could make, but it isn't. My brother is in prison and he gets out in just under a months time.
He is going back to live with Mum and she can't wait for him to come home.
I love my brother with all my heart, but I know he has not changed his ways.
He has been using drugs and has a prison pen pal who thinks he is going to go and live with her when he gets out. 
He won't be living with her because he and I had a fall out when he told me that he was just using her. I went crazy at him and didn't answer his calls or visit him for 6 weeks. It is an awful thing to do to someone. 
Mum thinks that he has changed and is expecting him to become the model son when he comes home.
I know that within hours if not sooner, he will hook up with his so called pals again and will be scoring drugs. 
I have no idea even how to broach this subject with Mum because it will crush her. She has recently just gotten over an illness in which she has to take medication for the rest of her life. If I tell her, I fear that she will hit rock bottom again. if I don't tell her, I feel like I am betraying her. If I do tell her I also feel like I am betraying my brother. My head is a mess because I don't want him going back to his old ways but in prison, he never learnt any new ones because he just simply has not changed.
He got in to drugs when he was at University. Smoking pot was the start and then he got hooked on the hard stuff, heroin. 
He became a completely different person and brother and it broke my heart and Mum's when he went off the rails to fund his drug habit. 
When our Dad died, he turned up at his funeral totally off his head and embarrassed all the family. He has stolen money from us and lied through his back teeth to squeeze money from us.
I just don't know what to do for the best. 
Please don't print my real name. 


NOTE: PWUK has sent the lady a list of support groups and prisoners families organisations that may be able to help and advise. Wishing you the best of luck 'Rachel' with everything.