'Why am I alone in my room?'
All of his women were in his house, but here, he was alone in his room.
This was the reason why he found to believe what was happening. Usually, his women always slept with him, but they suddenly said they wanted to sleep in their rooms.
His mother even refused when he asked her to sleep with him. Something like this had never happened before.
Of course, he still did not know that this was their plan.
Yes, this was the thing they discussed earlier!
'No! I don't want to sleep alone!'
With that idea in mind, he got out of his bed.
'Who should I sleep with tonight?'
All of his women were in his house, so he had many choices.
'Alright. I will sleep with Xingyi tonight.'
After thinking for several seconds, he decided to sleep with Xi Xingyi.