Sister's Faimly left my sister without any strong reason

Hello Sir/Mam, Meri problem meri sister se realted h..meri sister ki marriage isi year february me hui h...starting se hi meri sister ki mother in law, kisi na kisa dowry me diye hue samaan ko lekar use taana deti rehti thi..starting me meri family ne baat ki to problem thodi solve ho gyi thi..par kuch din pehle meri sister ki nand ko lekar unke ghar me ladai hui thi, meri sister ki nand ka kisi ladke se affair chal rha to jo meri sister ne apne husband ko bta diya ..uske baad me use apne ghar le aya..tab se ab tak meri sister ki family na to call karti h na hi hamara ph recei