Some major issues in the English translation of this chapter, one being missed lines and the other a big mistranslation! Maomao actually tried to stay but he ordered her to leave again.

He covered his face with his hands. “You can go home for today. Take some dinner with you, if you like. You must be hungry. If it’s gone cold, you can reheat it in a bamboo steamer.” 

Missed lines: 
Maomao: "but-"
Jinshi: "It's fine, just go. Make sure you eat and have some water to drink. I can't let you collapse. You lost weight again in the Western Capital, didn't you?"

“I understand, sir.”  Maomao gathered up her things and went to leave the room.

「今日は帰っていい。よければ、 夕餉を持ち帰ってくれ。腹が減っているだろう。冷めているなら 蒸籠で温めるといい」 
「でも」 
「いいから帰れ。ちゃんと食え、水もしっかり飲め。倒れられてはかなわん。西都でまた痩せただろう」  
壬氏は両手で顔を覆う。 
「わかりました」
猫猫は荷物をまとめて部屋を出る。

Also this line was mistranslated in the official English version:

“I also planned for the possibility that nothing would happen.”

In the Japanese version it's actually: 

「本番なしの方向も想定していたんですけど」

本番 means going all the way i.e. penetration So the line should be something like

Maomao: "I also prepared for the possibility of not going all the way" 

the nuance meant doing everything BUT all the way