Model Watching the Clock - original oil pastel over acrylic

The model has a great face and is well able to hold a pose, but toward the end of the session, she obviously was counting the minutes and the clock on the wall was just irresistible.  I have this urge to add to the drawing, but because I can remember scads of drawings and paintings I've ruined by trying to work on them after I'm back in my studio, she stays the way she is and I'll move on to another drawing.  Acrylic paint over acrylic paper with the drawing done with Sennelier oil pastels, this piece is 12 x 9".  Thanks for looking!