Twin Conflict

Question:

Dear Mary, 
I hope that you remember me – I wrote to you for some advice regarding my twins last year around September and you very kindly sent me some invaluable information, which I have saved and read through very often. 

I am having more problems with my son, specifically regarding his behavior towards his sister.

1. They can be playing nicely together when he will suddenly decide that he had enough and will jump onto her, pull her crayons out of her hands, throw her dolls on the floor or something to annoy her. Invariably, she comes running to me saying “look mummy what Maxwell is doing etc., etc.”. I try and encourage them to sort it out but it just doesn’t seem to work very well. This is in spite of getting them to sit down and discussing together – Maxwell will only answer “I don’t know” to everything, which is very frustrating.