Michael does want to swim—the water looks incredibly enticing—but he’s still nervous about walking too far from the cave, making too much noise, being too boisterous. It’s frustrating. He doesn’t want to hold the two of them back. At least Wolfgang doesn’t seem upset with him, and they said they were feeling better, so maybe this is okay for now.
“You’re gonna take us both back, right?” he asks after a moment, sounding slightly worried.