First time poster (long time lurker lol) me and my ex have had a falling out about him not taking his children as much as he could be so his gf decided to get involved by phone texting etc telling me I was out of order and I had no right saying stuff him bla bla bla, so I have now decided that I only want the children to be at his house whilst he is there (not having her look after them without him being there) can I do this or am I being a witch