Okay so Adora is a terrible actress yes. So when she and Catra get married how the hell does she hide the ring.
She either basically gives the game away almost immediately and Catra plays along all the while making comments that make Adora, who thinks she’s doing an excellent job lying nervous. When she eventually proposes Catra tells Adora that she knew about it the whole time. Adora is a bit upset because she thought she was doing a fantastic job lying.
Catra does the ring and if she does she’s going to do something like that guy who took pictures of his girlfriend while the ring was in the shot. At first, it was practical if she took Adora somewhere special she’d catch on but it eventually became a bit of a game. She finally does it when they go check on the deactivated heart for this or that where she proposes in the same place she where she finally told Adora how she felt.