I finally figured out how to do this.
It was midday, or later than that. Aberforth never had any intention of finding out what the exact time was. It seemed insignifigant, in a world that was constantly changing, what the face of a pocketwatch displayed.
Albus had taken to wandering absent-mindedly in circles around the hazy living room, debating things in his head, Aberforth presumed. Sometimes he would walk in as his brother paced about the cherry wood table. He would mock Albus, or look away: thinking, himself, about how it was.
Things were different now, and Aberforth surely recognized it in Albus's brow; he had always been good at picking up on such things. He would look at his brother and notice a single glance, they shared. They would understand eachother's thoughts, without any magic to aid them, and he, Albus, would go tend to Ariana. They were a force together for their sister. There was nothing hidden. There were no secrets.
The day he came, Aberforth had been expecting more. A rugged, black haired man, big boned, perhaps Albus's age or older. Never would he have imagined a thin, pixie-like blonde with a supercilious grin, reserved for Aberforth and Aberforth only. Oh, how he disliked that grin.
Gellert Grindelwald. The alliteration of his name reflected the consistancy of the looks he would shoot at Aberforth, whenever they were in eachother's eyeline.
He was handsome. Aberforth would admit to himself but no other that he had taken a certain fancy to the boy, from the moment he saw him. There was something challenging about the looks, expectant. Something that was melting the snug relationship he and his brother had kept. Something that made Albus's eyes ice.
Aberforth hated Gellert . He had taken Albus's place pacing around the living room table. They thought he knew nothing. The truth was, Aberforth's shame directed at taking a fancy to another young man was nothing compared to the excessive amount of nights Albus would sleep with him. It was completely disgusting.
Albus and Gellert must have thought that saying nonsensical phrases would keep them going longer. On numerous occations, Aberforth had wandered into the living room in the late evening and they would be sitting on the table, half naked, exploring eachother while whispering words Aberforth's vocabulary failed to recall.
His heart actually beat faster at the thought of their pale bodies intertwining, soft skin touching skin, hair pulling; rather sickening boyish fantasies he had tried to block out, to no avail. In his logical mind, he hated that there was a they, he craved a 'we'. But in his mind of emotions, he wanted nothing more than to be his brother, to know the words Gellert whispered.
There was no concept of time, in his mind, except an end, and a forever. Aberforth knew that this would end, and he wanted it to end. He wanted too much. It was greedy of him to want so much. It was greedy of him to want his brother back. It was greedy of him to want to take his brother's place. It was sick and wrong to crave the touch of Gellert Grindelwald. This is what he thought of while pacing about the table and what he dreamed of at night.