Shin Uchiha paused, then continued, "I wondered whether, as our Yin Release and spiritual energy grew stronger, our Mangekyō Sharingan would grow stronger too, until they crossed a certain threshold and evolved into the eternal Mangekyō Sharingan."
At this point, Shin Uchiha pointed at his eyes and said with some pride, "The facts proved my guess right. As long as we keep increasing our spiritual energy and developing our Yin Release, perhaps with a certain degree of physical strength as well, we can evolve our Mangekyō Sharingan into the eternal Mangekyō Sharingan.
"And when we're close to meeting the requirements, we can actually get a vague sense of which ones we haven't fulfilled yet. So unless our talent truly falls short, there's no need to resort to such a bloody, inhuman method."
Uchiha Fugaku took a moment to digest Shin Uchiha's words, then let out a deep breath. That finally cleared things up. This meant Uchiha Itachi and Sasuke would each have another option in the future, without having to turn against each other.
Then Uchiha Fugaku returned to the original topic. "Then how did you get Mikoto pregnant? Fortunately, I wasn't away on Whirlpool Island for very long, so we can say it happened before I left."
Hearing Uchiha Fugaku bring up the matter again, Shin Uchiha rubbed his nose awkwardly and explained, "Hasn't everyone in the clan been calling for more children lately, to strengthen the Uchiha Clan? And I was a little curious whether the child of someone with the eternal Mangekyō Sharingan would be exceptionally talented. So one little slip, and..."
Even as he finished, Shin Uchiha knew his excuse was hardly convincing, and he gave a few more awkward chuckles.
Uchiha Fugaku had not expected that excuse. All he could do was give Shin Uchiha