Michael crept up behind Betty, closing the distance to less than eight inches.
This was the gap between his torso and her body, but an additional element was present—Michael's erect penis.
Although their bodies weren't touching, his eight-inch length meant that the tip of his penis was perilously close to Betty's buttocks.
As Betty swayed slightly from her showering actions, it seemed her buttocks might brush against Michael's tip at any moment.
Some of the water cascading over her body had already splashed onto Michael.
Betty, unaware, could have easily turned her head and seen Michael behind her, but she did not.
With a gasp from Betty, Michael wrapped his arms around her from behind, his hands naturally finding her breasts and beginning to gently knead them.
It was all driven by instinct.
Michael's groin pressed against Betty's buttocks, though his penis did not penetrate her; the angles were all wrong for such a connection while they both stood.