Adrien couldn't help but blush as Luka held his hand. He knew it was fine, but he kept looking at their fingers interlocked, feeling Lukaxs thumb gently rubbing back and forth over his hand. He'd never really dated before. Sure, he'd done photoshoots where he'd pretended, but nobody could fake the hard beating in his chest as Luka fed (Y/N) some cake as the two laughed together. He was happy to be here, even more so now that it was a date, but I couldn't help but feel like he was trespassing. He used to be a source of pain for Luka, and (Y/N) had to help him pick up those pieces. He almost felt like he didn't deserve their forgiveness, let alone their friendship.
(Y/N) nudged Luka when they saw the distance look on his face, and the boy immediately squeezed Adrien's hand. Luka moved his other hand to hold the side of his face "You okay?" He asked, his voice sweet and quiet.
Adrien nodded, biting his lip slightly "just getting stuck in my head a little, I'm okay."
Luka kissed his forehead, "then why aren't you getting in on this cake? You want (Y/N) to feed it to you."
Adrien shot up in his seat, suddenly bashful at the idea "I mean- I wouldn't...mind.."
Luka laughed as (Y/N) sat on his lap with a plate of cake samples in their hand, holding out the fork "say ahhh~"
Adrien couldn't hold back his smile "ahhh~" he giggled as he chewed on the strawberry shortcake, practically moaning from how good it was. It was just the right balance between the fruit and the sweetness of the cake. He loved sweets, but he usually wasn't allowed to have them because of his diets. "It's good!"
"Oh?" Luka smirked leaning closer as (Y/N) climbed off his lap "mind if I try some, agreste?"
"Go for it! But I'm pretty sure (Y/N) has the-" Adrien was swiftly interrupted by Luka pressing a kiss to his lips. He froze, melting into the kiss when (Y/N) squeezed his hand.
Luka pulled away with a grin, laughing a little "You're right, it does taste good~"
(Y/N) pouted, "you never kiss me like that." They said, a teasing smirk on their face.
Luka laughed, "do you want a kiss too, baby?"
"Please?" (Y/N) asked, in a way that left Adrien wanting nothing more than to be the one to kiss them.
Luka leaned so close their lips were practically touching "how can I say no when you ask so nicely~" he said, finally pressing a quick kiss to (Y/N)'s lips.
Adrien's head was still buzzing from his unexpected kiss from Luka. He could practically feel his lips tingling as he shyly took the boy's hand again. He'd be lying I'd he said he didn't want to do it again. He wanted to kiss both of the wonderful people at the table. He listened intently as they talked to eachother, appreciating the bond they shared as (Y/N) and Luka make a point to include him in the conversation.
Luka kissed Adrien's head again, whispering this time "we tend to share affection pretty freely but if you need us to slow down just tell us okay?" Luka looked down, biting his lip "We're both really glad you're here, we want you to feel comfortable."
"I do!" Adrien half-shouted "I've just...never really been in a relationship where I've felt so strongly and it'd a little scary." He laughed a little at his own self-consciousness, looking down at the hand in his lap instead of Luka.
Luka glanced at (Y/N), who nodded "we were both scared too. It takes time to get used to it, and there's a first time for everything. We'll take baby steps." Luka paused, taking a moment to think through his next few words "I'm sorry if the kiss was too much too fast, I-"
"I loved the kiss," Adrien said, looking up at the brunette "I just- didn't expect to be so nervous. I've never been with a guy before and (Y/N) is just so-"
"Devastatingly perfect?" Luka finished, and continued when Adrien nodded by looking at (Y/N) "yeah," he smiled "you never get used to that."
It was (Y/N)'s turn to blush, but they didn't say anything as they soaked up this moment. Luka turned back to Adrien "just tell us what you're comfortable with and that's what we'll do."
"Well, is it okay if I kiss (Y/N) too?" Adrien asked shyly, he wasn't sure what the rules were.
Luka laughed "of course, we're all together now. As long as they're cool with it, of course."
"Which I very much am," (Y/N) said, popping more cake in their mouth as the boys talked.
Adrien smiled, leaning over and kissing (Y/N) quickly "I think I'm gonna like this."
"Oh I know I'm gonna like this," Luka said "twice the people to spoil and twice the kisses, what more could a guy want."
"I don't know," (Y/N) laughed "but you guys should have more of those cake before I eat all of it."
Luka and Adrien nodded, returning to their task as official wedding cake testers, Luka needing to be fed because he was busy holding both his partner's hands. "I think this is the first time I've had this much cake shoved in my face"
"You said there was a first time for everything." (Y/N) laughed "this is totally what you meant."
"Of course," Luka said as he looked fondly as his lover "how could I have forgotten."