Ds1 is 10, Ds2 is 7 & Dd is 5.
The problem is that Ds2 is sooo jealous of Dd. He goes out of his way to antagonise her, is rude to her and ruins whatever she is doing. When we are all together he sucks the joy out of our time together.
We have talked to him rationally, ignored his behaviour and now I just get so angry with him.
I am at breaking point. Dd & Ds1 are very close and have a lovely relationship which I hope all 3 of them will have.
Any ideas or experience of such jealousy??