Work in Progress - double portrait children

Pencil drawing on sketchbook paper in the top image of two young children.  Bottom image is on watercolor paper, Langton 140 lb cold press by Daler Rowney.  This work in progress took a couple of days and is totally imaginary, a commission that will be a real challenge.  I am two double portrait commissions behind, having put all on hold to work on illustrations.  After this one will be easier as I'll have photos of a newly married couple dressed in  Indian attire.