Reed didn't wait any longer and as soon as both Aria and him got to the mansion, he went straight to the old man to tell them about their departure to the penthouse.
They’ve spent enough time in the mansion, being in the mansion with cunning snakes while Aria is in a delicate state doesn't seem safe.
Understanding Reed's perspective, the old man didn't delay them any longer and he blessed them both and urged them to call him regularly as he can't wait to hear the news of the delivery of his grandchildren.
Butler Louis was sad seeing them leave but he pacified himself that it's for the best...