This doujin was published as part of the Translation Update of the week of the 25th.
Translator: mintvoid
Editor: vanitas

Doujins.com link:https://doujins.com/original-hentai-series/kinzoku-koutaku-the-blood-that-pulls-us-together-and-the-chains-bind-us-79472

Definitely that info page should be at the end, not at the beginning, is like one of those modern trailers that spoils all the story.

Base +14, solastralia +6, Nakama_P +6, Dracolord1208 +6, Dorseen +8, selyts +6, clovis_486 +6, musoukaXIV +10, AhKai +6, mr.Orange +7, PinguPrin +7, Rinozi +6, Iexpectedbetter +6, and 26 more...

When I seen the mom's belly, I knew where this was going.

The blackout rape must have been out of shock, rage and anger of learning SHE was the "reason" his mom left him and his dad. Also the fact she KNEW he was her brother all along gave some yandere vibes. I am guessing she had a breakdown from losing her folks and is trying to do all she can to have the last bit of family she has left in her life from leaving.

Base +6, clovis_486 -6, Fofotron +18, mr.Orange +7, PinguPrin +7, Iexpectedbetter +6, TheBrojangles +6, okmonger +11, Nakama_P +6, Classified +6, Overl0rd111 +13, AhKai +6, as102 +13, and 11 more...

Repeated dialog on pg.20

Base +36, AhKai +6, Fofotron +18, TheBrojangles +6, TrinTong +6

So he chain his sister but the sister chain her brother too.

Base +7, Fofotron +18, as102 +13, zakalwe73 +6, TrinTong +6

from the initial exposition, I expected the story to be NTR.

he already married her right? so if the state allowed it, its fair game. she's the kid of the mother and the best friend, so half sister right?

Base +7, Fofotron +18, hoodedman +6, anonymousMember +6, TrinTong +6, Dooderz +8

I wish we got to see his reaction

Base +2