Thank you all for your support. I was at a very low ebb last night as we were so worried she might turn up and frighten the children. DS phoned the police and asked for advice. They were very helpful and were on standby should the worst happen but fortunately it didn't. Social Services are not really an option at present as this could exacerbate the situation. She can be very plausible to outsiders and I don't think the children are really at risk (except emotionally as they get older). The door was slammed in DS's face again tonight but at least she hugged the children as they went in. Last week he had to leave them crying as she would not let them say goodbye. We were unavoidably nearly an hour late after a special day out, though we had phoned and explained in advance.
We had a lovely day today with a Gruffalo hunt in the woods, climbing mountains, looking for mysterious animals in fallen trees, slug spotting, paddling in the river, throwing stones and making 'art' works - all for free!
The next worry is tomorrow night when DS usually takes his son to football training. She may ban him as she has done before, for being naughty (though he rarely is) and this again could escalate into threats.
We know that she does not cope well with stress but she also 'kicks off' if she does not get her own way. She is very controlling. Soontobe I do not know the answer either but I do try to keep 'onside' for the childrens' sake. I know that I have written at length but honestly I could write a book about the things that have happened! Thank you all again. I have three days to build my mental resources once more and I will do it!