Good suggestion. In the end it turned out reasonably well and quite paradoxical. My difficult sister was reasonably well behaved, apart from some little anger outbursts. I'm utilising a new method of PET (try not to take things Personally, don't Engage in argument and Tune out to any mutterings) She can't argue with herself but she knows my vulnerabilities. In conjunction with giving a wide birth and building up my self esteem I think it's a positive work in progress.
The paradoxical thing was my nephew was I'll and I went to the Spurs game on my own to use the tickets!
With releasing the memory balloon of Brighton pier in the sunshine it was a successful day. I hate lability and anticipatory anxiety.
Thanks for all the support folks and be well.
M