Settling a debt that was yet to be paid

Mo Xifeng looked over at the ocean that was shimmering under the warm sunlight and pursed her lips. She thought about correcting her mother over the misunderstanding that Mo Qiang had cleaned the entire ocean. Her sister had indeed cleaned the ocean but she hadn't cleaned the entire ocean, in fact, she had only cleaned it to the point where she could use it as for the rest she hadn't even bothered to care about it.

' Now that I think about it, didn't she stop cleaning the ocean right where Long Ju's territory starts?' Mo Xifeng whirled her head and looked in the direction where her sister went off to earlier. A single drop of sweat trickled down her forehead and down to her cheek before dropping ground. There was no way, right? There was no way her sister could have been so scheming. 

After all, when had she done anything after thinking so profoundly? But did she really stop cleaning the ocean right before Long Ju as a mere coincidence?