I have been with my partner for 2.5yrs and we both have kids from other relationships. I have 2 (B9 & G14) and my partner has 1 (G8) from previous relationships as well as a having 1 together (G14mnths). I am a product of a single parent family and having been a single mum too I am quite aware of how it feels to have new people come into your family and have always tried to help the older kids adjust with the blending but around 18mnths ago I started noticing my SD8 was being somewhat destructive be ways of dirty looks and sayings things that my kids had supposedly done. On questioning it turned out to be lies to which my partner didn't see at first, but as time went on, my SD8 would start giving ME the looks or if my partner or I said dinner or bedtime time talking to ALL the kids, I would be on the receiving of a bitchy/fuck you smirk and then she would bring on the tears and start gagging claiming I gave her too much food, even if it was my partner who dished up. The looks became more aggressive and when I asked why, she proudly announced in front of her Dad that she found it funny to see me hurt and upset. Then a few months ago, I collected my SD from her mum as my partner was working which I have done a few times no problem, except when it came to talking to her Dad on the phone. It would be agreed between myself, BM and SD that she would go home on Sunday as always but SD would say to her Dad with a cheshire cat grin hard to hide that she wants to go home on Saturday instead, again finding it amusing to play with peoples emotions, this made my partner upset as it would anyone myself included. This went on more and more to the point I was beginning to feel like a grass towards my partner yet having no proof of what was happening. Time and smirks went on, my DD noticed stuff was going missing as did I (jewellery, money, teddies and DS games) she was caught with a bottle of perfume wrapped in leggings by her Dad and that's when the penny truly dropped for him. By now I had seen my SD 'bump' into our baby and again SD found this funny but the last straw was when I told SD for a shopping trip and when we got home SD decided she wanted to pinch our baby and all with a smile on her face in a room full of people. She obviously denied doing, so when confronted I asked her how she would feel if someone my size had hurt her the same she gave me yet ANOTHER fuck you bitch smirk, stuck out her hand and said 'go on then' all infront of her Dad. I asked that she be kept away from me for a little while whilst I calmed down and it was spread around the WHOLE family that I forcefeed her food, I scare her with nasty looks, hate her and that I was going to take her to the police station for stealing..... NONE of which is true and now resulted in my partner (her Dad) LOSSING his whole family. The lies this child is coming out with if believed could have both my kids and BMs BFs taken with police and social services involved too. We tried to sort it out between ourselves as SD admitted she only came to see Dad and myself because she wanted her xmas presents then wanted to go home the other day and now there are threats of violence made by BM male friends towards me and I genuinely don't know what to do. I happen to love this child yet she is having great fun ripping my heart out and trampling all over it. I hate not wanting her near me as its now straining my relationship with her Dad (neither want to end the relationship) but I need to protect myself and my kids too. Someone pls advise before I loss the plot