As you head away from the Nurse's office, you hear a scream from your belly. Muffled of course from the flesh in the way, but quite clearly, Candy does not appreciate what Nurse Cassandra is doing. Just what that is is rather hard to figure out from the outside, tho it is clearly rather vigorous.

"Stop! I'm not that kind of girl!" seems to settle that.

"Try it. You'll like it." is the nurse's response. Which advice is not taken, at least judging from how much your belly is bouncing around. Candy is resisting as much as she can.

Not that is likely to be enough. Cassandra is bigger and stronger, and has engaged in a lot of these belly battles. Candy can't beat her in a fight and she can't run away either. She is in a world of hurt.
Or rather a world of pleasure. Cassandra has pleasured lots of girls in her time, and Candy apparently is not unusual among them. Her screams and her struggles weaken and almost stop, to be replaced by screams and struggles of quite different motivations. Cassandra builds up Candy's excitement and she convulses into a chain of spasms.
As Candy calms down, Cassandra changes position and demands an exchange of favors, which Candy agrees to. She seems to have realized that if you can't lick them, lick them.
The result is a frenzy of simultaneous explosions, which leaves both of the girls in a much better mood.

However, their vigorous action has stimulated your acid production and they have moved around enough to be completely bathed in it. Their digestion has been going on as they played, and by the time they recover their breath, they are little more than thick soup. Very tasty soup of course, but quite unable to do anything but nourish you.

As you finish digestion, you need to decide where to go next. Back to the ABA? Or get yourself another meal? The food will be more fun, but eventually you need to get back to your room, and your mistress likely will not be pleased if you take your time. Still, ...