I mean, yeah, they kissed and that’s kind of gross, but it was just to make Han jealous. Not because Leia was really attracted to her brother.
I’ve preached that message several times in my years here, but there are some who still think Luke and Leia were “making out” and that there was some kind of unresolved “love triangle” at the end of ESB.
Well, there is the deleted hardcore sex scene…