I think this is a situation for a lonnggg letter to mum.
That way you'll have more time to think what to say
in letter,and not be hampered with upset emotions.
Going by situation,and description of mum,this will
be necessary,or you will have to endure it for next
1yr, 2yrs, 5yrs? This is deliberate on my part to get
you into action,for it may indeed be many years,
you KNOW you HAVE to do this,don't you?
Courage,
BLUEDOVE