Find a romance novel!

The female protagonist had just appeared when she transmigrated and had seen her mother being killed with her own eyes. The Emperor believed that the Female Lead had harmed her mother and had been locked up in the Cold Palace. Fortunately, she had a childhood sweetheart, the son of a general, who had grown up with her.
Then, he was sent by the emperor to marry the male lead.
In the end, she seemed to have destroyed the male protagonist's country together with the male protagonist, and the female protagonist and the male protagonist lived happily ever after.
The son of the general who grew up with him had left.
The other details were that his mother was not dead and had been secretly rescued by the emperor. She was kept outside the palace and had a younger sister!

Answer 1

As a fan of web novels, I don't have the ability to search for novels directly. However, I can recommend some romance novels for your reference:

"Why the Silent Flute?"
"A slight smile is very beautiful."
"Shanshan, Come and Eat."
Hua Qian Gu
'Chu Qiao's Biography'
Three Lives Three Lives Ten Miles Peach Blossom
"A concubine's daughter is poisonous."
"Beautiful yet to end"
Ruyi Biography