I was there and I saw it. I was in the front row of the raised section so I had a perfect unobstructed view of both the stage and the screens showing everything on the stage.
I was already grossed out (and pretty clearly Connie was too) when he started by putting the microphone in his mouth. Then later as they went into a hug he clamped one hand on her left breast. It was blatant and unequivolcal, not a slip or a microsecond moment. She moved his hand and continued smoothly on, more or less ignoring what he'd done. Granted a slapped face would have been appropriate, but I think she was trying to be gracious not to him but to the large audience she was facing at the time and so elected to quickly end the maneuver by moving his hand and then carry on.