Looks like you captured a "for real" moment here, rather than something staged. Kudo's for that...and semi-kudo's if you fooled me. :-) Solid use of vignetting to control the viewer. Good luck.
The vignette, if it was added in post, doesn't work well with here and takes attention away from the two subjects somewhat rather than bring your eye to them. (My eye is actually drawn to her hand). Perhaps if a more subtle vignette was added and then dodging and burning applied to shift the lighter area to her and the baby's face it might be more effective.
In any event, this is still a touching scene and photographed well.