Experimenting with painting "Jenny Saville-style"

I captured my daughters in some photos on my phone during a trip to the park over the Easter Holidays.  Having selected five images to use, I began to experiment with where to crop the image.  Eventually, I decided on a focus on the figures.  I began to work out where the drawn lines should be.  In this image, the drawn sections are not working well at all in the top of the painting.  However, the feet are beginning to show some life.