Hello! Some answers were revealed in the latest novels, like Desire Me and Deflower Me, so here we go!
1. No, Josh is still using 'Bailey' as his last name even after getting married to him. I think because the weight of being called a 'Miller' is too heavy to handle. That info was revealed in Desire Me, so it'll probably show up in the manhwa later, I suppose.
2. No, the first one was Stacy (Grayson's twin), then Chase, and later Bliss. That info was known in the recent novel Deflower Me If You Can: Bliss's Story.
3. Until now, we haven't seen it. Sadly, because ZIG the author hasn't released the new side stories yet—we're hoping that with the finale just around the corner, she'll release them already!

Okay I got a couple questions
1. Did chase take Joshua’s name or did Joshua take chase last name. Ik this is like a Korean-American plot so I’m not sure if the Korean tradition of keeping their maiden name applies or…??
2. Is chase the first of his siblings to get married and have kids?
3. When is chase going to cross dress again cuz that was lowkirkly hot