Villainess story with no reincarnation or isekai? That's great!
I feel so sorry for Avril, who was constantly abused by her entire family. That father didn't deserve his wife at all. But beyond that, even with how twisted her family was, she persevered. Because it seems she wanted to help the people of the Allingham Territory.
Avril's wisdom, skills, and memory are unparalled, yet she couldn't use them at all because she was restricted.
And now she's being sent away because of her truly awful sister, who used her name to be a villainess. That was good for Avril though, as it seems this is the very reason Dylan wants to marry her. Why though, does he want to marry and divorce a villainess? So that he can claim he fixed her or something?
Corina's haughty attitude was never gonna trick someone in love. And Dylan seems to truly love Avril. So what changed, I wonder?