geez..she sounds like a terror...

1st off..close access to the bank account. limit it to only you & your girlfriend. period. if need be take away the atm card from your girl friend or change the codes..let the bank know that sam is not to have withdrawal access. period

is she in school? get with a social worker there or guidance counselor.

if your girlfriend refuses to acknowledge her behavior then you can call the authorities & report her action s (sam) as child abuse or as a child at risk..which she is..or call local PD...if this many other parents have complained to you already...there is plenty of info there to justify a report. this will get her into the system & get help staerted.

you have to keep any minors safe. that is your responsibility as an adult..you know there is a danger...& just writing about it here doesn't help to rectify it...there needs to be some action...if your girlfriend doesn't see it that way that is unfortunate...personally i would take your son & leave & not return until sam has been either placed into a residential program or the issue addressed. she will hurt your son. i think the issue is not "if" but rather when.

will sam be angry? yea. will the girlfriend be angry? yea. will she maybe end the relationship? maybe..but you might have saved your son from harm as well as any other minor children sam will have come into contact with in the future...as well as maybe saving sam from herself.