Does this seem like a reasonable pace for a sketchbook commission?
I don't want to seem overbearing since that would imply one page for every two weeks and she has work outside of art, as well as school, and having some genuine hard times. At the same time I don't want to wait forever and never see what I paid for out of an excessive amount of caring. She checks up to see if I've changed anything on my characters every six months or so, so it isn't like she has disappeared from the face of the earth.
What would be the best way to approach asking for an estimate on when the sketchbook would be completed without sounding hostile?