Salam alaikumwa rahmathullahiwa barakatuhu sheikh,
Sheikh, if blood sisters r not in good terms and not in contact, so if suppose the sister goes and travels to the area where she lives will it be sinful if she doesn't meet her sister ? Also the sister does do jinn involvement so that's on of the reason why she fears to meet her, is it advices to meet her or not ?
Wa'alaykumsalaam Wa Rahmatullah Wa barakaatouh
If your sister is as mentioned in regards to being involved in Jinni matters, then she should be adviced that this is a major sin - if she continues, their is no sin if you stay away from her fearing the religion of yourself and family.
Allah knows best