Thank Godric for skin that hides blushes Dean thought idly as Lucy smiled at him. He instead scratched absently at his stomach and ducked his head. "Yes, well," he swallowed and smiled at her politely. He recognised the flirting but didn't actually want to respond to it.
"A good source of motivation can be a plus," he said. The difference between their heights rather made him feel like he was looming over her somewhat and he took half a pace backwards as much for the sake of his own personal space as hers. "I'm pretty sure they had adult classes at the pool I used to go to before Susan moved," he said, trying to recall if they were lifesaving classes or just straight adult swimming classes. he'd seen on the timetable. "I can dig out an old timetable and let you have it if you like?" he offered. "I mean the pool isn't too near here, but at least it's a start." He shrugged, he was happy setting himself tasks and using Susan's pool to dive for whatever he felt like since these days he pretty much only swam here, and alone or with close friends.
The idea that Lucy thought he might work with Susan made him snort out a surprised laugh that rolled on for several seconds. He smacked a hand over his mouth and taking a few seconds to compose himself before dropping it again, the amusement lingering around his mouth and eyes. "No, really not, we met at Hogwarts through Seamus, but you should tell her you asked if it was at work, because it will give her a good laugh I'm pretty sure." He coughed. "Sorry, shouldn't have laughed, but my little sisters laugh at me when I tell them I'll protect them from shitty boyfriends and ask if Susan can do it instead. Her: lovely but terrifying auror. Me? trained artist. Far less scary," he explained with appropriately overblown faces and hand gestures.