I hope you aren't offended when I say this...but when I read that all I could think was 'what the F$#&K are they THINKING!?!!?'. I'd almost go as far as saying that is emotional abuse...you poor niece...do they WANT her to go off the rails? I dont know what to suggest but I just feel so sad for your niece and really hope your brother and his girlfriend wake up to themselves and actually think about the consequences of what they are doing.