It definitely seems like even after leaving the pool of water, they're being affected by its inhabitant. Heine takes a moment to Conjure himself some new clothes—at least a robe he can pull over his shoulders and close over his front—even if no one can really see him.

"We should get out of the area." And find someone new. Heine accepts the second thought without even thinking about it. A moment after he does, he realizes, and tries not to startle violently at the accompanying sensation of something wet and warm working down the inside of his thigh. It's leftover slick from the creature, he figures, but it feels weird.

(He doesn't want to consider the possibility that it's his own body's creation.)