I think she would have a very specific look that signifies her deep thinking. Her head would be in the clouds, her gaze somewhat adrift. Even during sex, you would be able to tell that she's not quite there.
It's best to stop the action and help her snap out of her thoughts. Ground her to the present moment. Sit with her until she's able to come back to her senses. Her partner's patience would be rewarded with a sweet session of love making where her attention would double down on them.














