Magically no curfew
After being so against my DS having no curfew when he turned 18 (this last fall), and adamantly stating that OSS will continue to have a curfew, magically the last few weekends OSS has been out much, much later than DS has ever been. (I know the times because I can see it on our family locator app. Times/location history comes up as you open it.)
When I didn't come home at my curfew there was hell to pay. There were negotiations as I aged of later and later curfews, but I didn't get to just ignore the rule and no one pretended like we had all telepathically decided it was okay.
DH has said nothing to OSS. I don't care that OSS is out, I'm just tired of the hypocrisy. DS mustn't be allowed to handle his own night when it's proactively implemented (and aren't I a terrible and permissive parent), but OSS can when he just passively stops adhering to his established curfew.