Nice capture. A recommendation for next time is to use a lower exposure and use fill flash. The reason being that will keep the sky behind them from being blown out.
With the shot here, I would suggest some burning of both shirts and your mom's arm (see if your photo editing software has a burn tool) - it's an easy way to 'paint' darkening over a part of the image. I also cropped a little tighter to remove the arm in the upper left.