Did Leia know Luke was her brother when she kissed him?
In ROTJ Leia says
"somehow I've always known"
If she has always known then did she know when she kissed him?
She searched her feelings, and knew it to be true that she *really* wanted to p— off Han.
There's a difference between consciously and unconsciously knowing. No, she didn't consciously know this - i.e. she wasn't aware of it.
Leia meant that the connection she always felt towards Luke now made sense - the one that she originally misinterpreted as sexual love, but realised was (appropriately enough), sisterly love.
Even when Leia kissed Luke she had other motivation - to annoy Han in particular - this, combined with a sisterly love she didn't know was in fact a biological connection, was enough for a kiss.
On TV Tropes, one person argues: > The "she only kissed him to make Han > jealous" argument does kind of ignore > the fact she practically snogs him > again at the end of the film, when > he's unconscious and there's no-one > else in the room...
Doesn't she kiss Luke twice? I'm pretty sure she also kisses him when they are about to swing across one of those endless death holes in Hope.