Good triangle composition. The girl on the right's expression is to die for! The mom's eyes are closed which runis the shot for me. The girl on the left is adorable but seems not quite sharp, or maybe it's that both of her eyes are in shadow. Lighting for the girl on the right is outstanding... perfect hint of light in her eye to make it sparkle.
Great shot..love the expressions of the little girls but no the mom...what is that she is trying to covey or it was a miss timing click? Anyhow I love this picture.