As much as I am frustrated with the show's pacing and Deokim's constant rejections , I find her rejections realistic…
Also her eventual acceptance of his proposal , I think two things push her to make that decision.
1.First is Dekro's death.
We face Death here and there everyday. But the death of certain people in your life can make hidden thoughts surface on your mind. Like I wish I could do that before his death etc etc.
Even imagination of your own death can happen and you want to try everything you wish at that mournful time. ( this happens to me a lot ). You don't want to dwell onto uncertain things that have not happened yet and just wanna grab little things that make you happy.
2. San's Thank You speech
As much as we understand San cherish her , we saw he kind of lowkey forced her into giving the answer he wants . I think it's part of his nature as a king.
But that' thank you' speech makes her feel his real sincerity for once and may make her feel like his equal.
She spoke her mind on episode 4 after she had known his real status as a CP. She just wanted him to offer her a sincere apology. I think little things work for Deok Im.
As much as I am frustrated with the show's pacing and Deokim's constant rejections , I find her rejections realistic .
The king's affection is dangerous.
1.After being a part of His Harem ,it's like having a target on your back because you become involved in Court Politics whether you want it or not.
2.The king is a man and as like some men,his affections can change. If he becomes bored with you and find another woman, he can abandon you easily and there's no loss on his side while as a woman of the harem, you can't even angry with him and the best thing a consort can hope when you fall out of favor, is not to get killed by his whim on your slight mistake. On the other hand , as his woman who loves him, you will be left heartbroken and become a ball of hatred but cant do anything.
That's what happened to Anne of Cleves with Henry VIII . We see that in the harem of chinese emperors .
3. The King is the father and husband of whole country before becoming a woman's husband . So for the country sake ,he will calculate every move and some of these moves may hurt the woman even if it's unintentional .
2 
This is the question lingering on my mind after watching the whole series.
1.First is Dekro's death.
We face Death here and there everyday. But the death of certain people in your life can make hidden thoughts surface on your mind.
Like I wish I could do that before his death etc etc.
Even imagination of your own death can happen and you want to try everything you wish at that mournful time. ( this happens to me a lot ).
You don't want to dwell onto uncertain things that have not happened yet and just wanna grab little things that make you happy.
2. San's Thank You speech
As much as we understand San cherish her , we
saw he kind of lowkey forced her into giving the
answer he wants .
I think it's part of his nature as a king.
But that' thank you' speech makes her feel
his real sincerity for once and may make her feel like his equal.
She spoke her mind on episode 4 after she had known his real status as a CP.
She just wanted him to offer her a sincere apology.
I think little things work for Deok Im.
The king's affection is dangerous.
1.After being a part of His Harem ,it's like having a target on your back because you become involved in Court Politics whether you want it or not.
2.The king is a man and as like some men,his affections can change.
If he becomes bored with you and find another woman, he can abandon you easily and there's no loss on his side while as a woman of the harem, you can't even angry with him and the best thing a consort can hope when you fall out of favor, is not to get killed by his whim on your slight mistake.
On the other hand , as his woman who loves him, you will be left heartbroken and become a ball of hatred but cant do anything.
That's what happened to Anne of Cleves with Henry VIII .
We see that in the harem of chinese emperors .
3. The King is the father and husband of whole country before becoming a woman's husband .
So for the country sake ,he will calculate every move and some of these moves may hurt the woman even if it's unintentional .