She's feeling Crusher's stomach change shape with every push. Coupled with the Prisoner's body pressing in from behind, her heightened sensitivity, she's have a very intimate moment.
Just as an early heads up, I'm planning on posting to new websites soon but I'm taking it as an opportunity to edit and punch up the comic. I'm planning on adding sex scenes and making a few art changes. I just started the scripts today. The changes will come in next month at the earliest.
If you guys have suggestions for new websites, I'd love to hear them.