Shortly after Vaan entered Aeliana's room and shut the door, three other bedroom doors opened almost simultaneously.
Cyrena, Dahlia, and Silvaria poked their heads out of their rooms before they noticed each other. Then, after a short period of awkward silence, they wryly smiled at each other before withdrawing their heads back into their rooms.
Meanwhile, Aeliana did not make the same mistake as her mother. Once she entered her room with Vaan, she immediately insulated the room with a sound barrier.
Even if she didn't do it, Vaan would have asked her to.
Although Solana had forgotten the first time, he also chose not to remind her. He wanted to see how Astoria would react to hearing them making love.
Without a doubt, Astoria had also woken up like everyone else, except she chose not to be a busybody like the others.