We all saw that kiss in 1977.
I will go to my grave insisting that the whole "Luke and Leia are siblings and Darth is their dad" thing was entirely retconned when the original movie blew up the box office beyond anyone's wildest expectations.
"But, but, George Lucas says..." Yeah, yeah, he also says that Greedo shot first*, so we know he's a bald-faced liar.
*As everyone who saw the original unedited Star Wars knows, Han didn't shoot first... Han shot only. Greedo didn't even get a shot off before Han smoke-checked his bounty hunter ass.
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