Taking the pix at face value:
* Just before the pic with grinning Franken and Tweeden the Camera man (Al Franken's brother, BTW) said, "Say cheese!" Other than that it happened before the C-17 ride home, we don't know the timing. It may have been before he slipped her his tongue. Or maybe she just grinned and bore it for the sake of the USO.
* The pic with the guitarist - the lack of reaction by the guitarist means that she was behind him but not touching his behind. 2-D images lack depth perception and provide fewer depth clues.
* The picture of the "kiss" - this actually supports Leeann Tweeden's account of that skit. She said she decided to avert her face at that point, and the picture shows that her face is turned away from him.
Not that facts matter on DU or HuffPo.