Watch that Depth of Field

When taking photos with a camera that you control the aperture setting, make sure you watch your setting and that you are aware of the depth of field.  This image shows what I am talking about.  The last pretty lady is a little soft (and I mean the crispness of the photo - not the lady herself!).  This photo was taken @ f4.8; 1/125, and ISO 200. 

The exposure is good, so how could I get a higher aperture????  Up the f and up the ISO!  I could have taken the f stop to about f8 and kicked up the ISO to 500.  That would have given me more depth and a touch of grain from the higher ISO.