The two stood waving goodbye until the carriage became a small dot, then siqhed.
"..It seems our fathers don't know?"
Cecil looked up at Cyrus with anxious eyes.
Cyrus looked down at his lover and stroked his forehead Though he couldn't precisely understand what those green eyes meant, he felt obligated to reassure his lover.
"They don't seem to know."
"Thank goodness."
That's what happened at the last chapter, idk if there's more, but that's what happened.

I just finished reading the novel about their sons (Cyrus [the younger brother/the seme] and Cecil [the older brother/the uke]). Alesia is the firstborn, and here's my summary of it. (SPOILERS)
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Cyrus has loved Cecil since before they were even born, so he constantly read books to understand his feelings. Cecil loved spending time with Cyrus, too. One day, they saw both of their parents having sex. At that moment, Cyrus felt like he wanted to break the boundaries of his relationship with Cecil and be more than just brothers.
It started with them kissing secretly and imitating their parents' actions as they grew up, They shared the same room, started having wet dreams about each other.
Cyrus would get jealous over Cecil most of the time, but he wouldn't do anything about it. One time, when he desperately wanted Cecil's attention, he threw himself down the staircase and crashed loudly.
This caused Cecil to show up screaming and crying. Cyrus hoped that after this, his brother would only look after him. Alesia found it suspicious, though, until Leira pulled her away. Cecil found it suspicious too... but then it somehow turned into flirting, which leads into them giving each other blowjobs.
Later, their home tutor was giving them homework when the conversation suddenly turned to why incest is bad. The tutor used historical figures to explain it, mentioning that it causes diseases and that children born from incest are considered sins in this world.
As the tutor spoke, Cecil's face grew paler and paler. After class finished, he ran away with Cyrus following closely behind. Cecil was crying, but Cyrus told him that those rules are only for humans, and they aren't humans! , "We can't stop now, Cecil, you like me too, brother!!"
A short time skip happens here, I think.
But Cecil decided they should stop... so they did. Cecil became less talkative and distanced himself from Cyrus. Meanwhile, Cecil was really popular at school and loved by everyone, which made Cyrus so jealous that he burst out at him. He told Cecil that what happened between them shouldn't be forgotten bc they love each other deeply.
They fought, and after that, Cecil slept in another room, however, when he had to go to their shared room, Cyrus was there, they started arguing until Cyrus unexpectedly went into his mating season. They have a lot of really hot smut scenes after that, and they finally made up.
Then, Cecil finally said, "I like you," for the first time. Everything between them was so sweet until...
Alesia found out. She started crying and sobbing because it scared her, telling him, "Even beasts don't do such things!" "You're both mistaken!" "You have to stop!"
Cecil replied, "I can't do it! I hurt Cyrus a lot, I can't do it!"
She then asked him to leave and go to the other villa, or else she would tell their parents, saying, "I can't leave you two like this."
When Cyrus came back, the first thing he naturally did was ask where Cecil was. He got mad and argued with his sister. She kept telling him it was wrong and that she would stop them, but he didn't care one bit. He told her she was too obsessed with humanity and how they act when they aren't even human.
Cyrus found Cecil, he thought Cecil had left and abandoned him again, Cyrus started talking about how much he loves him and how he would never, ever leave him, Cecil said the exact same back to him, then they made up again
In the end, Alesia never told their parents, but she didn't forgive them either.
All I can say is that this was a nice, simple novel for incest enjoyers like me, the guilt and taboo really hit me, and it had a cute, happy ending for them. I enjoyed reading it, it was short and fun one, and I'm really hoping it gets adaptation too