I have a son who is 5 and my partner has a daughter who is 4 we have lived together for the last 3 years and there has definitely been ups and downs between the kids. They have never really got on very well there has always been bickering and arguing but they can get on and play nicely just very very rarely. Things seemed to be getting better between them so me and my partner decided to have a baby so I am currently 6 months pregnant. Recently the kids have been getting worse and worse with each other and it is mostly DD winding up DS it is constant she will copy him, kick him under the table, follow him around, want everything that he has, she talk over him louder and louder so he can't be heard. He does well most of the time to stay calm and ask her to stop but understandably when she doesn't stop he's gets upset or angry. I'm not saying he is perfect because he definitely has his moments to. DD can be very attention seeking so I think she does it because she knows she gets attention for the behaviour, we have tried ignoring it but it's not that easy when DS is upset or angry by it. This morning my son spoke to me and said he feels sad and angry when DD is here, I chatted with him about trying to stay calm and we tried to think of different ways he can deal with it. I know we need to do something to sort this situation me and my partner have both said that we feel on edge when both kids are here and I now feel my son is feeling the same. My son also said how he feels like he gets wrong for it and he does at times when he reacts angrily, but it is both of them that get asked to stop the only difference is my son will get upset and say sorry for his behaviour, whereas DD isn't bothered she will often laugh and not be bothered it's like she gets a kick out of it. It's just constant she can't be in the same room as him with out winding him up, i feel exhausted by it.
Sorry for the long post my son speaking to me about how he feels this morning had made me realise we can't continue like this.