In that case, wasn't the person he was fantasizing about, while having sex with the noble consort, Yun'er?
Feng Tianlan sneered after seeing his reaction. She then showed the portrait to everyone. "I believe this is the naked portrait that the imperial eunuch mentioned in front of everyone. The Beiqi Emperor has been hugging it to sleep every night. This is the portrait that made him lose his mind. An emperor and a princess. Such absurdity!
"At first, it looked like Feng Tianlan. However, after having that red dot between her eyebrows, which only Princess Yun had, it looked more and more like the princess."
"There's some trickery in this portrait. It looks like both Feng Tianlan and Princess Yun. However, people who understand art can tell that this is a drawing of Feng Tianlan, based on Princess Gu's looks. It failed to achieve what it was trying to portray; therefore it's easy to tell who the original character in the portrait is."