Probably! While Link and Zelda are never shown actually kissing during the games, it's quite obvious they have a "Thing" for eachother. So, I guess you just have to wait for future games to see if it happens!
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I recall that at the end of Legend of Zelda II: Link's Adventure, it is implied that Zelda kisses Link as the curtain is near the stage floor. Outside of that, nothing stands out.
Zelda kisses Link in The Windwaker, so that scene is probably on Youtube.
Aside from grunting when encountering damage, Link never speaks during "The Legend of Zelda"
Zelda and link ,No, they aren't siblings. but link has a little sister in windwaker
In The Legend of Zelda: Ocarina of Time, Link finds out that Zelda is Sheik, but only towards the very end of the game does Zelda reveal herself to Link.