I don't think she can but i would like to know if i should worry , i am a green card holder with no criminal record what so ever , work hard to provide my wife and baby , for personal reasons we decided to cut ties with her , and to keep my baby away . now she threatens " indirectly " by making You Tube videos claiming that she will contact authorities to have me my sister and mother deported if we don't comply and let her interact and see my baby . my sister is getting ready to initiate the process to obtain a green card and is legally married to a US Marine not that it makes a difference who she married . she is also trying to take us to court over " grandparent law " is there such thing ? can she legally obligate us to have her in my daughter's life when me and my wife believe it is not the best .