Can see no flash and the coloring gives that away also.
Since it appears you were using 800 ISO the flash most likely would not fire as there was enough light not to trigger a flash. This would have been much sharper with say ISO 100 with the flash.

If I might suggest... keep your eye out for distracting things in the background like clutter behind people. (like clocks, knicknacks, stuff on the walls,)

Good luck!

Kristine