The child won't have to "live with it" as the child won't have any memory of it. It is a sad, tragic, and ultimately preventable incident that the anti gun drones will flock to in an effort to create outrage and discord all in a vain attempt to drum up support for their failed gun grabbing attempts.
The facts are that you are far more likely to die from almost anything more than a gun. The gun grabbers don't try and deal with those issues, they always go after the gun because so long as people are armed they can't force their collectivist nightmare down the throats of the people and that just pisses them off.
Oh come ON...
A two-year old toddler, who's by definition dependent on and bonded with its mother, isn't going to have questions about where she went? Certainly it's too young to comprehend what exactly went down (besides her). That isn't the point. The question of "guilt" didn't even occur to me -- of course it's not the child's fault. Not the point. That will have to be explained, and not explaining it or lying about it is probably worse than never addressing it. Still not the point.
The point is that child is going to have to wonder what kind of fucked up world has it been brought into that walks around with a loaded gun in its purse. As should we all.
You gun fetishists can see only down the barrel of your own fetish object. Your ultimate concern seems to be, "oh that's a tragedy, but the question is -- how is this gonna affect Numero Uno?"