For me, that question is more complicated than I think she meant it to be.  I would never, never wish away Mila.  I would always choose to give up whatever wisdom I've earned -- I would willingly be less zen, less empathetic, less aware, less grateful -- in favor of keeping her.  At the same time, I can't wish away any kids we have in the future, either -- I want all of my kids, even though they are probably mutually exclusive.  It's enough to tie a person into existential knots.
I think, though, that this is a useless mental exercise.  What does it matter what I would choose?  I don't get to choose and I don't get to go back.  All of these things have happened.  They made me who I am now.  That's all there is.
