Main was camera left at about 45 to subject with 1 SB600 and a medium softbox.
Fill was camera right and close to camera with 1 SB800 using a large softbox.
Hairlight was above and behind subject with 1 SB600 through a small softbox.
All softboxes were photoflex with double diffusers. Flashes were set manually with my cheap light meter.
There isn't a lot of light in my unfinished basement which causes the larger pupil. I may add some more light to decrease pupil size a little. I did not make the pupil larger in post.
I have no experience with this type of photography. I only got my first DSLR 2 months ago. I hope you keep posting your results and documenting your technique. I bet there are a lot of us who could learn a great deal from your experience.
She is adorable. Hope to see more pictures of her.