Betty seemed to sense something was about to happen, though she couldn't see it and thus couldn't confirm her suspicions. When Michael's tip pressed against her entrance, Betty finally realized what Michael was about to do.
The shape was unmistakably different from a tongue; while a tongue is soft and wet, this was undeniably hard, though still wet. Michael's hot breath washed over the back of her neck, leaving no room for doubt about what was pressing against her.
With a sharp intake of breath, Betty's eyes snapped open, a hint of fierceness flashing through them. Her resolve hardened; it was clear that any further movement from Michael would provoke a reaction. At this point, her expression showed she was beyond caring about anything else.
Behind her, Michael was in a similar state. His tip, now pressed at Betty's entrance, could feel the softness and warmth of her. His face was twisted in a struggle, his eyes locked on the point of contact, wrestling with his next move.