property

Dear sir my sister in law she is residing in my native.my in laws are given 90% of property for her without intimate my husband .after that again she came and disterbing and given dhamki to my old aged in laws and that time also given 5% property.in laws kept only 5% property for my Hus .again she came and irritating my in laws and giving dhamki to said she want scale the property.these time inlaws informed my Hus and he called up her.she also thretend him .mean time we are not making any issue and no objection for giving 95% property because of she as a sister.but again and again she and her husband thretaning and giving dhamki to killing.so in these circumstances what we can do sir .please help me .we did not gone for any issue .she is making theses