Thanks to Conan, who used Aries's name to his heart's content to beat sense into Abel, the latter had no choice but to take her to the Sapphire Palace. He would've taken Aries to her room and asked Joaquin nicely to give them some space, but Conan made him promise to not do that.
Aries called the shots in this entire operation and, honestly, Abel was just squeezing himself in the entire plan. The only role for him was to be an audience. In other words, he had no right to spoil everything. Those were Conan's exact words.
"Now that I think about it, he's so mean." Abel frowned, lying on his side with his temple propped against his knuckles. He had been caressing Aries's jaw casually while thinking about how he ended up in this place instead of taking her to his room, the emperor's room.