the twins deserve to have telepathic conversations without knowing it. and han deserves financial compensation for having to constantly put up with that
I find it really funny that in Star Wars, Han is canonically about the same age as Kanan & Hera (only a few years younger even in old canon), but because of how they grew up they veiw people 10y younger than them completely opposite ways.
Like Kanan & Hera grew up in active war zones with Generals as parents. They were forced to grow up FAST. They had to be functionally adults before they got a chance to be teenagers. And resultingly they look at anyone young enough to not remember the Clone Wars as babies. They see an angry Mandalorian teenager as the toddler she was in the Clone Wars, drawing on walls to express emotions she can't otherwise express. They see a force sensitive street rat as the tiny crecheling who wasn't even born till the final days, and wouldn’t have even entered the temple until a few years after the war, but who would have ended up his Padawan eventually anyway. And they adopt both in a heartbeat. They're in their 20s and see these teenagers, and are just like "Ah yes, our kids," and they are VERY much parental figures with an obvious generational gap.
But while Han does remember the Clone Wars vividly, he wasn't on or anywhere near the front lines. And he didn't have anyone actively raising him. He didn't have a chance to grow up and got stuck in a mental standstill during adolescence. So he looks at Luke & Leia, and he sees peers. It doesn't matter that he lived through an entire war before they were born, cause he sees very little difference between that one and the one they're currently in. He sees them as his own age group just a little younger and treats them accordingly. He treats them as friends and equals. Leia isn't a kid in his eyes, she's a spitfire woman who has seen more war than he has. And there's a little bit of big-brother-ing to Luke - but more based on Luke's naïvety than age. Theres nothing to suggest he views any real age gap between them, let alone a generational one.
But they're still the same age, and from what we see of their interactions are very much peers and friendly rivals themselves. Which makes me laugh at the confusion Han would react with to realizing that Hera's children are older (even if only by 2 days) than the twins and childhood friends with Leia...