Shirou, Rin, Sakura, Saber, and Archer discuss the situation

AN: Sorry for the late post. As I mentioned in a comment, I had a big change in my life. All last week I barely had any free time to do anything other than sleep. I will not go into what this change was. My schedule should be stabilizing this week and I should be able to do a chapter a week. It might not be posted on the weekends, but we will see. Again, I am sorry for the late chapter after not posting any last week.

Back outside the Matou Household

Archer stood closely behind Shirou, his swords in his hands. He was ready to restrain or kill Shirou, depending on what happened to his Master. Though, Archer was getting the sense that probably would not be necessary. Shirou seemed pretty calm for someone who was essentially being held hostage. Knowing the boy, it was unlikely that he and Sakura came up with some devious trap to take out Rin.

After some time, the front doors of the Matou estate opened. Looking over, the group saw Rin and Sakura at the door. Shirou could see some redness in Sakura's eyes, but she seemed to be happy. Seeing his Master was unharmed, Archer moved away from Shirou and rejoined Rin. "Is everything alright, Rin?" he asked.

"Yes," Rin answered, glancing over at her sister. "Sakura and I just had to discuss some family matters."

Noticing the glance, Archer relaxed a little inside. "I see," Archer said as he unsummoned his swords.

"We're ready to meet on the matter you invited us over for, Shirou," Rin said. "This way, please"

Once inside, Sakura lead them to a small living room. There were a few chairs and a small table in the middle of the room. Everyone assumed positions around the table.

Shirou began explaining what happened last night. Rin looked concerned on learning about Caster watching them.

Sakura pulled out the notebook and placed it on the table. "This is what she might have seen."

Rin looked quizzically at the simple, black notebook. She blushed a little at the title on the notebook. "So, why is that a problem?"

"This might be hard to believe, Tosaka," Shirou began. "but this notebook has the power to do things involving...sex."

Rin starred at Shirou, dumbfounded, before picking up the notebook and opening it. She saw the rules written on the page. "I am finding it hard to believe this notebook does what you say," Rin said, putting the notebook down.

"I can prove it works," Sakura said as she picked up the notebook. She turned to a blank page, set it on the table, then took a pen to it and wrote.

Rin Tosaka's breasts will grow one cup size and have double their sensitivity.

Sakura returned the notebook to the table, open to the page she wrote on. Rin starred at what Sakura wrote, before she felt pressure building up under her shirt. Looking down, she saw her chest grow out. The fabric of her bra was rubbing against her breasts. She'd felt this before, but not this strongly. Rin was shocked at what had happened. "So it does work!" she shouted in surprise before picking up the notebook and looking through the pages. "This notebook might be able to do things that magecraft would take tons of resources to d..." she suddenly stopped when she came to a certain page. On the page was written the sentence.

Sakura Matou is Shirou Emiya's sex ****. She will act normally in public around others.

Rin's face turned red and she glared at Shirou. "EMIYA," she screamed as she pointed her index finger at him, about to fire a Gandr. Sakura jumped in front of Shirou. "Big sis, it's ok."

"Sakura, please move aside," Rin growled, starring daggers at Shirou.

"Sis, you don't understand," Sakura pleaded. "I asked senpai to make me into his ****!" Hearing that, Rin froze for a moment.

"Everyone," she said quietly. "Would you give me and Sakura a moment?" Shirou, Archer, and Saber got up and quickly left the room.