People always talk about Serena and Dan dating while their parents were dating but it's also weird to me that it didn't seem to bother Lily and Rufus at all that their children were dating

I know Serena asked Lily to stay away from Rufus once and they didn't date for Dan and Serena's sake but then it was like they didn't care, it didn't cross their minds at all when they hooked up in s1 (while Lily was supposed to marry Bart Bass), and again in s2... Just the fact that Serena had to beg her mom to not date her boyfriend's dad in the first place because Lily didn't even think of it Idk it just seems pretty selfish to me especially since they're the adults, Lily and Rufus were overall pretty immature and didn't really care about how their relationship affected their children (including Jenny in s3, she was constantly put in the middle of their fights and they were so focused on their issues they didn't realize how miserable she was)