Pamela, it is good that you and your dogs survived the weather and that your sister is coming round

.
It might be an idea if you got urgent advice about the money things. This is not about me but my story might give you some context.
I have been separated from my wife for about eight years. I think that we just grew apart and, with the power of 20:20 hindsight, there are things which we both could have done differently. We have a joint bank account with a lot of money in it. Sometimes either of us needs to make an unusually large withdrawal from it. Out of mutual respect we always check with the other first and the response is always the same; "
Yes, no worries.".
It worries me a lot that DB is taking a lot of money out of your joint account without checking with you first. It does not seem fair to me. Can you get legal advice and/or talk to your bank about this?
With care and concern.