Imaging Sirius going back to Grimmauld Place after he reads in the paper that Reg died and demanding to know what happened
And Walburga not saying anything to him at first so he apologizes and she still doesn't let him in so he offers to be the heir and she actually looks at him for the first time and he says Now that I have your attention can I come in to see my brother? And she doesn't say anything and just let's him in. The portraits are screaming at both if them calling her a disgrace for letting him back in until she eventually silenced them all and then she sits him down and says she knows he has him and she is working on finding him! That Regulus will be found even if that means hurting Sirius and Sirius is just like I don't have him! The paper said he's DEAD and you're accusing me of what KIDNAPPING HIM??? And she says "I read his journals I saw about him and that Potter boy your so fond of!" And Sirius is shocked thinking What is she talking about??? and says "That should be your first hint! Reggie would never leave his journals for you to read! I am telling you I don't have him! I don't know where he is!' but she keeps grilling him but after a while he can see in her eyes that she's starting to panic so he ends up staying there in his old room and it's freezing cold in there and then the next morning she tells him that if he wants her to call off the search of the Potter’s Manor he has to make a blood oath to become the heir again. He agrees and they spend the whole day turning him back into the perfect heir (appearance-wise) and that evening when they start to perform the blood oath he wakes up in his cell in Azkaban bc it was all a dream. And he never had the chance to save Regulus or James.












