Originally, Adeline wasn't after the Delarosa's territory and authority; she desired Chalmers' affection.
Unfortunately, she couldn't obtain it. Thus, her mentality became increasingly twisted with jealousy and envy as she watched Chalmers and Belline together.
Chalmers and Belline being able to have two daughters spanning a few years apart also made Chalmers all the more desirable in Adeline's eyes. After all, it proved Chalmers had great seeds.
Arabelle was shocked when she found out Adeline had been trying to seduce her son for years, even after his marriage.
And when Adeline couldn't get what she wanted, she secretly captured Chalmers and locked him in her hidden chamber, where she forcefully tortured and made love to him day after day, year after year. This did not stop even after Chalmers turned into a corpse.
Arabelle became livid with rage as she listened to Adeline's mind-controlled confession.
This arc will soon reach its conclusion. Although I have the subsequent arcs planned out, I'm curious as to which direction my beloved readers wish to explore in this story next.
A: Gehenna vs Pangea (This is another war arc that will be important for plot progression and expanding & exploring the infinitely vast world of Chaos)
B: Great Ratholos Empire (This is a minor training arc)
C: Freedom Federation (This is a world-building arc that expands and explores a bit of Vaan's home universe instead of Chaos).
You can pick which one you want to see the most or pick all of them in the order you want to see. You can also add suggestions of what you want to see if it isn't among the ones mentioned above.