At first, I liked reading it, siblings love BL and all that, but I got uncomfortable slowly. I mean, the author or MC writes/says it frequently that he was a 13yo kid!!! With 30yo mind. How could he not mind his kid body getting mollested every day??? And s*x in another 3years?? Yeah, I get how 30u young man is thirty for s*x but your body is still a child *facepalm*
ML is your typical seme with power and might, possesive, jealous type, nothing strange with his whole characteristics, what you call it yandere type? No rape than goodness. I dont really like this type, but seems it's the popular type of seme to write and get the reader to admire.
MC is one confused character. Yes, they were bad people, but to purposely manage the whole 'digging pit and bury them asap' is somewhat one-sided. With adult, they might not change their attitude, but with your peers the same age? You can direct them to be better, why throw them to graves (not literally) even when they havent done anything?
And your younger brother? Even if he was bad before, this time he's just baby. If MC afraid of his misgiving, he only needs to get rid the mother, pamper and raise his younger brother as he likes it. Then you might get another liltle one for yourself lol
The only problem is the pregnancy part. It's too...... fast and not really specific. Maybe the author wanted to end it asap or wanted to write the whole circle of the torture being a woman XD.