Would you/have you let somone else breastfeed your baby?

Of course. Women (and men) can find the whole situation weird, but if you, your sister and the baby are all fine with it there's no problems. If I was in the same situation it's what I'd do, and of course if a member of my family or a friend asked me to help in that way I would.

Better than the baby being hungry or really upset!

As long as I personally knew the other person, knew her lifestyle and knew she was healthy then I would. Your baby was distraught and hungry and you couldn't get to her - so you asked someone you knew, trusted to help out. You hade made arrangements for the time you were being away, and then made a plan-B when plan-A didn't work.

If I'd been in your situation, I would have rather my baby to be fed, calm and happy then left to scream and cry for three hours.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.