Hi Sarah,
Hope that you are going ok, I know it can be upsetting when someone else tells news that you wanted to keep quiet or to tell yourself. Was your Mum maybe looking for someone else to be able to talk to by telling your aunty? Not that that in any way excuses her for what she did but maybe she is having a hard time coping too. I can totally understand where you are coming from on the trying to relieve stress on people for next time around. I feel like that constantly & I know that my MIL will stress her head off when we are PG next. She was bad enough when I was PG with Alex after we had a premature birth with James, who knows what she'll be like when we are PG again!
Have you spoken to your Mum again about how much it hurt you when she did what she did?
Feeling that your body let you down is a big thing for me too, & I'm really scared about trying to have another baby. Guess I am a bit in the mind set that I had trouble going to term with James (he was born at 32wks after my waters broke at 31wks) & then with what happened to Alex, that maybe my body won't be able to manage a PG to term. But guess we'll have to wait & see on that one.
Anyway take care of yourself,