Sounds like she does not know the way to manage the trouble, so I advise YOU aid Grandma together with her authorized obligations along with your niece, considering that her wellness is unhealthy...I could suppose a authorized marriage was once now not played as she was once/is a minor on the time, and now not emancipated through the process first. - There is a authorized system for the niece to stop institution, additionally, otherwise the penalties do fall again at the mum or dad(s) for loss of compliance. An open speak with the institution, via everybody worried, could usually be in grandma/niece's great curiosity. - Counselors will have to be in a position to direct you in the direction of the authorized steps to independence and confidently inspire her to keep her top institution schooling, as good. (Schools, everywhere in the nation, are handling identical problems as your household's and feature assets to aid you variety them out.) I suppose it is transparent, the brand new "husband" demands/will have to be authorized mum or dad over the woman (considering that he is of age and residing in combination as a household unit already), making HIM in charge for buying her to institution daily...Grandma will make matters worse if she does not manage her authorized duties first, tho. - She can use your aid!...Good good fortune.