"He had used such clear words, he shouldn't overthink it, should he?"
Based on his understanding of her, she seldom thought in roundabout ways. She had always been straightforward, needing only to be told things clearly. There was no need to beat around the bush, as that might actually lead her to misunderstand."
But what if, just in case, the young lady became jealous? That, too, could be unpredictable and unreasonable to argue with, making it hard for him to gauge when Little Concubine might feel jealous.
And if she really did get jealous, well...
It might not necessarily be a bad thing after all. He didn't favor Xu Rongying getting too close to his Little Concubine. If the Little Concubine became jealous because of Xu Rongying and distanced herself from her, he would actually be quite pleased.
Thinking of this possibility, the Emperor suddenly felt refreshed, as both scenarios were acceptable to him, so there was no need for undue worry.