@Lily9915 Couple of things, I think a lot of people myself included, had been quite confused about if you moved back into your childhood home with children following a relationship breakdown, or if you stayed on there and had children there and then a relationship broke down, and it does make quite a difference as to how your mother might perceive things, but it still wouldn't make it ok.but at this point I think people don't need to know to understand that this really isn't about the mail, that's just the symptom of so much more.
But, while I'm sorry you've had some pile on, actually your step dad is incredibly important in all this because I'm pretty sure if you'd posted in relationships from a bit of a different slant people would be able to articulate better than I can, how there's a war going on about who has the right to what around your mum, and it's a nasty bit of triangulation that's only going to be sorted by you not needing to depend on living with her, or being confused by what she actually wants.
Underneath the issue of what they/he are doing wrong in opening your mail, and his manipulations, there's another deeper one that's making it all hurt so bloody much - I'm going out on a limb here, but it's it's almost like you're resentfully competing against a Golden child sibling who you know will always bitch plop and win, but you're still trying to convince your mum to not let him over everything, because he's not better than you, and it's not fair and if she's prepared to tolerate some behaviors from him, how come it's different for you?
That's hidden by the needs, but it's the emotional battles underlying the practical ones and it's helping keep you where you are and undermining your children's future in the process instead of you striking out to a better life.
I hope this comes over as I mean it, it's not a criticism of you, it's a reaction to hearing someone complaining about the quality of bandages provided being the issue, instead of recognizing the actual wound that's been and continue's to be delivered...
I knew that when J0y posted it was going to resonate, and I think a lot of this may also connect up to 'But we took you to stately homes' but I'm not able to explain articulately.
I wish you well, and freedom from all this fast, and the hope that you may be able reclaim the bits of your relationship with your mother that may be positive from a safe distance without the rest.