
Credit goes to @xViolet on novel updates :
King/Emperor
MC becomes the next King with the blessing of the Sun God. Since she is not a descendant of the current royal family, its going to basically be a new country. MC's dad suggests that she becomes an emperor instead of king and she agrees. MC's dad helps her to gain noble's support in order to turn the kingdom into an empire.
MC gave the 1st prince and 2nd prince (CP) the title of Marquis.
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.Pregnancy
During MC's pregnancy, ML was the one who had all the symptoms of morning sickness. Sometime during MC's dad visit, he mentions that the baby will be a girl. Apparently MC's dad was also in the same situation as ML when his wife was pregnant with MC. When MC's mom was pregnant with MC's brother, everything was normal.
In the end...the baby was girl.
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god
The Sun God blessed MC so that she became a "god". Being a god, her life is extended a few hundred yeasr and will always keep her youthful appearance. This blessing will also pass onto her descendants. After a few hundred years, the MC passes away :)blob_teary:) and the Sun God gives one last present to MC by returning her to before she died in modern times. MC summons ML again and they meet up again!

Credit goes to the owners of the spoilers: @dahlhoney on novel updates (I'm just copy pasting the spoilers):
Who's the ML?
Harry aka Theoharis.
- Does the "Heroine" come and try to bother her?
Sort of. But not really. She gets on MC's nerves sometimes but the "Heroine" is a reincarnation of a sinner, a thief who betrayed & stole the goddess -who invited/brought MC into this world-'s heart(that's why the "Heroine" is a strong wizard) so she can't really win anything since she's living in a realm where the goddess she stole from is ruling, she gets nothing except punishment for her sins from her previous life.
- How does she establish her territory?
Land/manure development. She has knowledge from the novel so she knows a few things others don't. So she develops a few specialties that can be only found in her land(trees, hot springs, magic rocks etc) also gets a partnership with a dwarf(as a blacksmith), and since she has Harry(Theoharis the demon) she can control wyverns -a creature that is feared & known to be untamed, she makes a 'dragon order' made out of knights who train and fight on wynerns (wyverns are considered to be a cousin of dragons) as another specialty of her land. She later on picks up the holy sword no one(even the founders of the empire) could lay their hands on from the dwarves' territory. That helps her reputation as a villainess change. She also has the goddess supporting her back(the goddess wants MC to be her representative -that's why MC has the holy sowrd- & go against the "heroine").

From user @not shiko from novel updates
their marriage also happened in a similar way bc harry heard rumours about yveria marrying someone so he barges into the room she and cassian were in and he tells her marriage is bad and its a shackle and she should be free instead so yverias like um do u even know who im gonna marry and hes like yeah! some fellow named harry but listen i heard hes a very bad guy so dont marry him because he thinks shes marrying some noble dude also named harry
so yveria just goes the guy im marrying is in the same room as us right now and harry looks over to cassian like omg was ur name secretly harry this entire time?! and cassian is so uncomfortable so yveria just straights up tells harry shes going to marry the guy standing in front of her,
Meh don't like the ml he's a crackhead I try to skip his chapter's I love fl interacting with her servants more hope those chapters will come soon ( ̄へ ̄)