Draco rolled his eyes. "I only stood up once. You usually make me do it until I collapse. Those two steps didn't hurt that much."
"Your smaller muscles will start hurting more when you're walking. So, don't think it'll get easier now."
Draco snorted. "We have this conversation every time we make a new step."
"Well, it's important to clearly explain...."
"Yeah, sure. It's my birthday, apparently, and I don't want a lecture, minion."
Harry laughed. "Yes, your highness. But do you want a massage? You've complained before about having rest days."
"You're not going to torture me with your ridiculous exercises?"
"No... I'll save them for tomorrow." 
"Goody," Draco said and rolled back and forth a bit. "So, was this your... plan? To get me ready for my birthday?"
Harry nodded. "Only a little. When I came back, I knew it was coming, and pushed you a bit."
"A bit? You've been on me for days doing non-stop exercises."
"You were my only patient. You probably could have tried a couple of days ago, but it was probably easier on you since I waited."
Draco huffed. "Well, thank you, though you made me cry on my birthday."
"I'm so sorry," Harry said with a smirk.
"Seriously, thank you. I can't remember when I had a better birthday. Maybe before Hogwarts. I mean, my mother sent me gifts, and my friends would give me small gifts, but being in Slytherin... it wasn't... couth to organize a party or anything. I'm sure you Gryffindors were different."
"Kinda. No big celebrations... besides Seamus," Harry chuckled.
"Finnegan. He always did like to brag."
"Yeah... but... I... umm... actually did invite people to come over, today," Harry mumbled, shyly.
"People? Like more than you... and Joel?" Draco said, warily.
"I... suggested that Hermione bring the kids to see you, again. If that's okay?" he asked, his face lined with concern.
Draco smiled. "It's fine, Harry. It'll be nice to see them, again. When were they coming?" 
"Hermione said that she'd bring them, if you were fine with it. Blaise and Neville said that they'd stop by after school.
"Okay."
Harry sent a Patronus, and they chatted a few until they heard the children jabbering loudly in the hallway. Granger was trying to keep them quiet, but failing as they sounded super excited. Draco heard Natalie greet her and offer help before they knocked. Harry was already up and opened the door for them.
"Uncle 'Arry!" Hugo said and hugged Harry's leg. 
Rose was holding her mother's hand, who was carrying a circular dish in her other. When Rose saw him, she squeaked and pulled free from Hermione and ran toward him. "Uncle Draco!" She hopped up onto his lap and hugged him, while kneeing him in the groin. 
"Oww," he groaned. "Hey, there."
Hugo also detached from Harry and jumped up onto him, screaming excitedly, "'Appy birthday!"
"Kids! Don't jump on him!" Hermione yelled and looked horrified.
Draco bore the pain and waved his hand. "It's alright."
"Still. Hugo, Rose, listen, Draco is injured, so be gentle with him, like you are with Grandma."
Draco huffed. "I'm not an old woman, Gr-Hermione." Hugo laughed.