Putting Dora out before aggressive issues arise is managing the dog.
Don't wait for her to show aggression. Keep everyone safe and remove her before the aggression surfaces..
I have a client whose little dog does not like her 7yo niece. They wanted them to get on, but in reality it was better to put a management system in place. Oscar is now removed to the laundry when niece visits and is given a bone.
Once a dog learns a behaviour it can become part of it's repertoire. So I could never guarantee that Oscar would not nip their niece when she got a bit excited (the child that is, this dog never gets excited). We of course did lots of training but he already displayed the behaviour and could well do it again.