There is a difference between putting on a show and actually doing shit like that in your personal life. He kissed her on her shoulder and afterwards gave her a peck on her head. What he did is the equivalent of the double cheek kiss they do in France and Italy.
Now because of the whole R.Kelly shit going on people on social media are looking for anything to run with and spin out of control. The shit was harmless. I don't condone or condemn it but this is doesn't deserve the outrage it's generating.