I feel so bad/immature/useless writing this but I’m in desperate need of advice or tips. I have been with my partner nearly a year and he has 2 beautiful children, boy age 1 and girl age 6. I also have a son aged 7. We all new eachother years ago when he was still with his wife (i had nothing to do with there separation nor was I around or in their lives at that time). Right now he has day-to-day care of his children but the custody battle is very very messy. Him and his ex wife do not communicate and she has recently got supervised visitation 3 times a week and also 10minuyes twice a week to visit there daughter at school (which I do not agree with as it’s not helping the situation with there daughters struggles at school) anyway I thought for a long while that I/we were making progress. We were all building really good relationships and my partner and I had been building really good foundations but recently things have changed drastically. His daughter is blatantly disrespecting me, will compare me to her mother, tell her father how much she doesn’t want to be here and she will constantly talk about her mother while her father isn’t around and bring up memories that she has of her father and mother (she uses this as a way to disrespect as she knows that this behaviour is not allowed). I’m getting to a point of confusion and I am just lost as to what to do. I am trying everything I know to try. It is very difficult because of the custody battle I feel like I’m walking on egg shells atm. Her mother doesn’t help the situation as she is mentally unstable but I don’t and never have spoken an ill word about her to her daughter. My partner is good at disciplining in a gentle but stern way, he balances things well and he is doing everything right by his children, myself and my son but I feel frustration always towards his daughter and I’m worried I could effect this relationship even more if I do not learn how to deal with all of the situations and problems we are dealing with atm. And in the mean time my son gets less attention because we are/have been concentrating on helping my SD. Help before I lose my mind? How do I cope and does anybody have any tips? (I love my SD to bits but I am struggling).