September, October, and November were the months that Regulus really grew up. At first there was a lot of tears and tantrums from him; he was upset at everything. He was tired from the extra attention that his parents put on him now that there was only one son in the house but at the same time he wanted more attention, he felt very lonely.
His father was working on some top projects at the ministry and was out until late most nights. His mother was helping a Black cousin redesign her boutique shop (the Blacks were always fashionable) or she would be preoccupied with her Pure Blood Ladies Society where gossip and tea became the most important thing in the day.
As for Regulus…well he finished all his studies, his parents finally admitted that and he was free to do whatever he wanted provided he stayed in the house or was in a Black-approved house. He hated it without Sirius.
On the bright side, he was getting very close to Kreacher.
Of course his parents reacted impatiently to his tantrums and insisted that he should be strong like a true Black. True Blacks never showed their feelings. True Blacks were also not emotionally or physically dependent on anyone else and never got lonely.
But Regulus did get lonely. It didn't help that he didn't receive any letters from Sirius. He also stopped writing to him, because well a Black has his pride.
But Sirius was the topic of the day and night in the Black house. First it was his scandalous inability to enter the Slytherin house but then his choice of friends became an even more controversial topic.
Remus Lupin and Peter Pettigrew were both from Wizarding stock, with both parents working at the ministry as low level staff. But their families weren't influential at all and certainly not belonging to the pure blood class. Not even second grade pure blood class. They were flabbergasted as to why Sirius would make them his close friends when they didn't have anything to offer him.
As well, reports from the Black cousins, Andromeda and Bellatrix, were reaching them that Sirius was spending most of his free time with muggle-borns which made their teeth gnash with anger. They were convinced that he was doing this to spite them and embarrass them against the pure blood society.
But it was his best friend James Potter that really angered them. It was the first time in years Regulus had seen his father shout in anger, and it was the first time he did it because of his children. But despite countless howlers and written threats, Sirius was stubbornly getting closer to the Potter boy.
But that wasn't all. Then there were the letters of detentions, letters from his professors saying he was a brilliant boy but cause disruptive havoc in class and outside of class. His inner demon had finally been fully unleashed and Hogwarts was getting the brunt of it. Wallburga had fits almost every night on how he was shaming the family with his lowly acquaintances and rebellious behavior, and Orion was exhausted from the fits.
The only thing to redeem him was that he was top of his class and his magical prowess was only growing.
However there was still a very dark mood in the house whenever Sirius' name was mentioned.