Hello Peter - sorry that you lost little Charlie not much more than two weeks ago and now little Beanie is so desperately ill.
Many others on here have put it better than I could but my thoughts are with you and your wife.
I do hope that when the time comes, Beanie's passing will be gentle and peaceful. It was shocking to read how quickly the vet practise pretty well did away with her before her time by asking how you wished to treat her body before they had even treated the living patient.
If you feel at all uneasy, select another vet. For the time being, whilst you still have her, I hope that you will be able to treasure the time you have left.