Seamus had checked (and double checked...) with Susan that it would only be the three of them. Once she'd promised that there was no chance of Edgar or Ophelia, Seamus had agreed to come see the new pool. Though he'd come round the house with Susan before she'd bought it, that had been before the pool existed, so he wasn't quite sure what to expect. Hopefully there'd be somewhere to change into the swimming shorts he'd brought. If not, it wouldn't be the first time either Susan or Dean had seen him getting changed. The shorts were long enough that they covered the portion of the scar on his leg, leaving just the section across his stomach, hip and back visible.
"Hey," he responded, giving Susan a quick kiss on the cheek as he entered - then spotting that Dean was already there and giving him a wave. "Hey, Dean! Wow, this looks amazing..." He'd loved swimming, once, but after the war there'd been no where he could go. Even if he hadn't been concerned about the scar personally, there was no muggle way to explain it and wizards weren't exactly big on public swimming pools - despite the fact they'd be able to fit them into much smaller spaces than muggles could do. He was looking forward to making use of Susan's pool as a semi-regular thing... Or at least, he thought he was.
He shouldered the bag he'd brought containing swimming shorts, towel and not a great deal else. "Is there somewhere I can change or should I whip my kit off right here?" He grinned, trying to make a joke of it even though ever since Dennis had seen the scar he was feeling less comfortable with it than ever. "Mam would approve of the food idea, and the beverage as long as it's soft. She's been nagging that I'm losing weight." Which, as would likely be apparent to one as observant as Susan when he got his swimming shorts on, he had, though he was putting on a show of being unconvinced by maternal concerns.