There's nothing particularly complex or exceptional about our petition as far as I can tell. Maybe our age has something to do with it, I don't know. She's 52 and divorced, I'm 50 and never been married. Neither of us has any criminal record at all, not so much as a parking fine. I've never outstayed an ESTA when visiting, and never had any issues with immigration when visiting her in Washington State. I'm from Scotland, so I'm a British citizen, which isn't a problematic country as far as I know (despite Brexit). Whatever's causing the delay, I honestly don't think it can be the contents of our petition, but who knows?