i have a sister-in law that is obsessing over trying to ruin my life, she is trying to split my husband and i up.. she is claiming to other people that i have been sleeping with my ex and my husband is in jail.. and she has been telling people i am stripper to make money.. she messages my 12 year old step daughter and told her in detail that she knows i am sleeping with my ex.. i am not.. she is harassing my ex and his g/f now. . she mess. them last night at 2 in the morning until this morning telling my ex's g/f to check on her b/f he was with me and she was right beside him the hole time.. she is telling people i take nude pictures to pay my bills also... i blocked her from FB months ago, she recently got on my brother in laws (her husband)FB and posted all kinds of stuff on my wall for everyone to see.. saying that my husband needs to divorce me.. she keeps driving by my house, and normally i can ignore it.. its starting to effect my life. people are showing me text messages she sends them... my husbands other brother called me recently telling me she was texting him outrageous things pretending to be me , telling him to come over to my house and screw me. that i wouldn't tell??? she did this on antoher occasion with another guy, she sent him pictures of me she stole off my FB telling him that i needed to have sex with someone because my husband is in jail... this is so un called for... you should see the conversations she has with these people claiming to be me. there is a new app.. where you can use other peoples numbers to text people, and i don't know what to do its like she is trying to ruin my image and my marriage... and i have no clue why??

what do you do when someone does this to you?
i know its harassment, but it feels to me like she is stalking me. , , , and pretending to me what in the heck?? that's a little over the top.. i talked to the cops and i got to prove it is her, so that would mean everyone that knows its her has got to prove that was her texting, i know it is she rides past my house everyday and flips me off the cops went to talk to her about that but since in the texts she doesn't say its her they cannot do anything. and she has texted me from her phone claiming to be someone my husband was messing with before he went to jail??? i want this to stop... how do i make it stop, and my ex and his g/f want it to stop too..