WW shot me an email asking why I had put $100 in her joint account (that she had taken all of her money out of then, and then several days later taken 4 dollars and change out of, as a little angry jab I think.)

I told her because I didn't want the account to get hit with an automatic payment or small charge and get a bunch of overdraft fees.

No response, but it was at the least, a civil exchange in which I looked sensible.