Here's a picture of the last bloom of the seedling. It has had plenty of water & some fertilizer so I guess this is the strongest the color will get.
I think I agree that Becky Lynn is most likely the mom. I probably will never know for sure but the color, veins & midribs all point that way.
I originally thought it was Double Sunset Glow because of it being a bitone. But I guess those can just pop up any time, who knew?
@ShakespearesGarden if you want the seedling I'll be happy to give it to you. I like it well enough but I am seriously short on space and if I don't love it, it has to go. I can't tell if it's fragrant because my allergies have been acting up. If you really want it send me a treemail and we can discuss the best time to ship it.