Also: Frodo doesn't like wearing clothes. He has sprinted into the council froom naked several Times.
Thorin claims it is a sign that Frodo is showing his masculinity; he’s showing his manly-pseudo-dwarf-ness and each time he finds himself chuckling into his hand because it makes the council members groan and meetings are “ended early” because Thorin has to take care of his little proud boy.
He’s a proud Papa, just saying.
Bilbo either sighs—when Thorin brings back their little buck-naked boy to the quarters—or shrieks when Frodo appears to him in person when he’s at the meetings; because whoops, this is probably his fault. Hobbit traditions, after all. Children have always ran through the Shire without a care, and Bilbo remembers his own childhood being similar.
But things are different now, he tells himself, and he tells his boy, and Frodo is cutely confused each time his Mama tells him that he has to wear clothes if he wants to run around; naked in his own bedroom is fine, but not when he wants to walk around with people.
“But I just want to be like you when you were a kid, Mama!” Frodo exclaims and that makes Bilbo sigh, and hold him close, saying,
“Unfortunately my lad, things are different now. Things are different here. And you get to be your own child, dear one.”
Of course, Thorin overhears the conversation and has an idea come to his head.
So when one day there’s a second, smaller, and still private garden adjacent to Bilbo’s own, it comes a surprise to the royal family, save for Thorin himself.
“So he can run around and have fun….just like the Shire.” He murmurs as Frodo giggles and runs off amongst the flowers, while Thorin himself strokes his lover’s curls.
“…Thank you, darling…” Bilbo gives him the sunniest smile and Thorin knows it’s probably obvious—there’s still some guilt there that he took the two most important people in his life away from their ancestral home, miles and miles away from everything they’ve always known but he’s selfish. He can’t let them go and Bilbo doesn’t want to be let go, either.
So they’ll make do and it works for Frodo rolls around in the trees without a care and Bilbo watches and laughs, while Thorin settles on the grass beside him.
“You know, you can walk around in your garden naked too.” Thorin teases him, and Bilbo gently bops his shoulder, but doesn’t necessarily disagree.
He may not be in the Shire anymore, but home’s not a hill—it’s the people that build the hills or crack the rocks or plant the trees.
And Thorin’s given him a garden that he’ll never abandon or leave to die. And that’s what fills his heart with so much joy, at the end of each day.