Seamus was slightly confused how anticlimactic Ron's unintentional outing was. Harry would tell him later, that he'd known they'd be okay with it, like Harry didn't care (hypothetically) for Ron having a male partner. He claimed that he was just very protective of what he considered his family...first and foremost Ron and Hermione and then his wife and children. Don't question it. There's no logical explanation.
Seamus would call it jealousy and he started to question that Harry's protectiveness was just fuelled by more than just platonic feelings for Ron, but he kept quiet about it. Itwas Harry after all. Harry was a weird bloke.
Harry never really thought about things just 'cause. Everyone that spend more than a few hours with him in the same room knew that. Harry was problem-orientated. He was confronted with a problem and then he tried to react. He did things because they felt right not because he really thought about them.
He's basically the contrary of Seamus. Harry has a problem, reacted and ideally afterwards it solved and he could find a way to explain why he did something. Seamus has a problem, he over-analysed it, became depressed, got drunk or blew something up and ended up with having more problems. Harry was good at reacting on instinct and Seamus was good at blowing things up. They were both good at what they ddid, but that didn't mean that Seamus was able to understand Harry. Probably no one does except Ron...Ron was good at finding out that there will be a problem before Seamus or Harry even noticed it to react. If he deemed something important enough to remember, he wouldn't forget about it.
Ron was a daft oaf, but he had the talent to go smoothly and undetected through his life. People often didn't even notice him next Harry until he'd done what needed to be done and a moment later he melted into the background again.
Ron, if his temperament didn't get the best of him, thought before he acted. Ron could craft plans that worked and included Harry knee-jerk reactions or Seamus' random explosions. If plan A didn't work you could bet he already had plan B to G in the back of his mind and Seamus suspected that that's what made him a good auror and a great help for George.
However, when Ron's emotions did get the better of him, he was utterly useless and almost better at creating havoc than Seamus. And now they did and Seamus is sittting together with a worried family in the kitchen, two overly clingy children in his arms, and waited for informations.
Seamus relearned the older brothers' names, Charlie and Bill. He learned that Bill was married to a woman that's not even fully human (her grandmother was a Veela) and it was not a problem. The second brother, Charlie didn't bother with relationships at all, may it be sexual or romantic which kept the chance of wizard offspring from his side pretty small. He said, he were too focused on protecting magical wild life in Romania to deal with another family beside the Weasleys. It was totally accept by both, his siblings and the parents.
Seamus really didn't get why Ron had been so scared to tell them.
Mrs. Weasley sighed and talked about the difficulty to give all your kids the same amount of attention especially amidst a war. "Of course I love every single one of them, but I'm just a human. I had to pay constant attention to Bill to not practise magic way above his level, Charlie to not bringing deadly animals into his bedroom and on the twins and Ginny to not cause general destruction... Percy and Ron were quiet and calm and had enough sense of self-preservation to keep themselves out of trouble."
She sipped at her tea looks sadly on her hands.
"We didn't feel unloved, Mum..." says a voice from the door, making them look up. It's Percy Weasley who enters the house, wearing the most boring dress robes Seamus had ever seen. Seamus had not the best memories of third Weasley brother. While Percy did save him more then ones from getting pummelled by the older Slytherins (Seamus had been tiny, prone to uncontrolled magic and had a funny accent, all things that made him an easy target for bullies), he made him write lines afterwards and had destroyed his and Dean's plans to make the school day a bit more eintertaining more than once with just his mere presence.
"Don't worry. Ron'll come back. Bill went to Egypt, Charlie went to Romania, I and the twins went away...We all ran away for a while and we all came back. It's only normal that Ron puts some distance between him and the family to find out for what and how he wants to live his life."
"Fuck you, Percy! And don't give me that shit-eatin' grin of yours!" rumbled the remaining twins' voice, who was coming from the living room and dusting the ash of the fireplace from his purple coat.
"he didn't need to fuckin' blow up my business house, just because he wanted to make an exit.
If I had a heart, I'd have fuckin' heart attack from that bang. My fuckin' remining ear is still numb. What a bloody arsehole..." George muttered under his breath. There is something raw and haunted in his eyes.
It hits Seamus then, that when George heard the explosion going off above him, he didn't know that his little brother and his children hadn't been in the apartment. George probably thought that another brother of him just got bombed out of his life until the aurors informed him that they didn't find any charred corpses.
"Come on, brother. You wouldn't want it any other way." snorted Percy, and the smile on his lips was so mean and so tiny that Seamus felt the Sorting Hat must have been nuts when he placed him in Gryffindor. George threw himself in one of the chairs. When he carded a hand through his hair he left black smudges on his forehead and temples. He looked at the sleeping children in Seamus' lap and visibly relaxes.
"So..." he grumbled tiredly, stealing the mug that Harry took from Hermione before and filling it from the round teapot in the middle of the table. "Shay...willing to share with the class, why your boyfriend thought in was a good idea to blow up the whole apartment and while you're at it tell me where he is, so that I can kick his bum?"
Seamus took a moment to breath. The fact that several people noticed he was not normal was terrifying.
"We're no'...He's no' me boyfriend! We're friends. We were never a couple." he muttered and realised how ridiculous it sounded someone like Mrs Weasley that had probably been together with the same man all her life, had a bunch of kids with him and still seemed to be really in love him.
"I love the kids, we share a life and for that I love Ron...but like a friend...like family. No' like a lover."
George rolled his eyes. "Listen. We're a big family, there are more than enough Weasleys born to the next generation. I don't give a fuckin' dragon dung about any of my brothers' sexuality! I don't fucking care what you and Ron do or how you define your...relationship. I just want to know where he is, so that I can yell at him for blowing up the rooms above my shop! So would you please tell me where he is?!"