The twist of Leia being Luke’s sister is just asking to be made fun of. Why not have a bunch of other characters gradually reveal that they’re related to him too?, with increasingly minor character related in increasingly minor ways. Either that, or make it really obvious that Obi-Wan’s lying when he answers yes to Leia being Luke’s sister, but Luke buys it anyways. Anyway, I’m gonna go put a laugh track over that scene now.
Don’t mean to split hairs in a thread that’s not serious to begin with but technically obi Wan never actually directly confirmed it.