Initially the character I was thinking of for the Mother was very much "Mrs Incredible".
Then I found this image (below) on http://drawingwithcheche.blogspot.com/ from an awesome artist whose work I love.
I can't find my sketches I did with the stewardess as inspiration.
But here are some early modeling stages.
To start with I liked the no nose idea and I was going to keep her eyes small and black.
I experimented with bigger eyes but I thought it looked to much like Bishop which is what I was trying to shy away from.
In the end I found a compromise I'm reasonably happy with (and I just plain ran out of time)