Future mother in law. . . am i right or am i wrong?

My fiance's mother can be a very nice person! But i can't help but think that it was all a show and that she was just trying to get close to me so she could find out some dirt to hold against me later! She had my man completely wrapped around her finger so much that 3 weeks before being deployed he bought a car and is paying for it and everything so that his mother can drive it! When he left for basic last year they got a joint account so that she could have access to his money in case she EVER needed anything. . . and OF COARSE she ALWAYS needed something. She even conveniently needed a few hundred the day after she found out about our plans to go to the beach! She has made comments (with smirks on her face) that mommy is always more important than the girlfriend ( Im the FIANCE) and dont make him choose between me and her because he loves his mother dearly and he doesnt want to disappoint you ( meaning me as in he doesnt really love me). She has very nicely told me what i am goin to name our children and that i need to be submissive for her son in order to make him happy! She has invited me to stay with her in there cramped apartment and i think it was make 'HER SON' as she so often refers to him as tho he isnt my fiance, think that she actually likes me or cared about the problems i was having! Anyway! a few weeks before he deployed he put me on a joint account with him which is where all of his depos go. not even 2 weeks after he left I got a phone from his mother stating that her son never told her about a joint account with me so obviously it was something i did that he doesnt kno about ( like you can just add urself to somebodies account!) and that since he left her as his POA she would have me removed if i didnt do it myself. of coarse i didnt do it so she moved all of his money to another account that... u guessed it, she is on!! After i told him what she did and he talked to her he unsurprisingly sided with her and now he has a seperate account and our joint account is used to pay our bill. She then called me back and thought that she was gonna curse me out because i told her son what she did and she felt that i was worrying him n could be the cause of him dying. needless to say she and i havnt spoken since. I left her an email (not apologizing) but askin if we could settle our diferences and i got no response. Oh my fiance and her arnt even speaking caz she told him to go to hell when he asked her what she spent $80 off his $ on! IS SHE CRAZY OR IS IT ME?