I'd go along with that andy. I believe that no child should be subject to this type of behaviour because they do learn from these 'messages' .
As you also posted here,
http://www.theanswerbank.co.uk/Parenting/Question66518.html
there has obviously been alot going on for you and the children which takes time to adjust to/ cope with. ( I agree with answers on that post too)
It is inevitable that all the children will meet, particulary if your ex is living with his new girlfriend. As much as this hurts and upsets you, this is his new family and he bound to want to include your girls in this. You need to try and concentrate on the life you have with your girls, as hard as it will be to start with.
I won't post what I think about your ex's treatment of you but he sounds extremely insensitive and selfcentred. I think it's enough to say you have my sympathy. Plus the editor will tell me off!!
Bohne is right (other post)...you don't know what he has told HER.... she may end up in the same position as you in the future!
Take care and good luck