A lovely portrait and I agree with Iain about the flash.
My main comment would be in connection with the focus. The stitching on the right jacket is pin sharp, whereas the eyes look slightly blurred and should have the focus. This is personal choice, but I always use the centre focus point for portraits and use the eyes as the target. Allowing the camera to choose which point is used can sometimes be hit and miss and this is the risk when using full auto.
Another downside of auto, is that the camera will choose a shutter / aperture combination and I see this shot is taken at 1/60th. The flash will freeze the action however, the relatively slow shutter speed could create blur with the ambient light and you need a steady hand to ensure sharpness.
Personally, I would use manual, as this gives much greater control.