So I gotta take her orb the last then, right? Damn it
You don't have to steal the orb from the mega slime. Talk to her and have sexy times with her until you find her asleep. Now leave the damn orb alone and go open up the other areas.
When you open the cove of rapture, walk out to the end of the docks, you want to aim at about 2 O'clock as you face out from the end of the dock, now dive in and swim out, for a ways. You should encounter a deep pit with lighted areas scattered around. Look around the walls of the area, there should be a building column laying against one of the walls. In that area (to the right of the column, I think), there should be a couple giant clams (on the wall, not on the ground) and you can interact with one of them. If all you hear are slurping noises, check back every few days. Eventually the clam will open up and there will be a pearl on the ground near the clam, talk to the clam and take the pearl.
Now, finally go back to the Slime Girl and you should be able to talk to her again and give her the pearl and She will say that you can have the orb. Now, you should have a happy mega slime, that you can bang whenever you want.
