Since even Vincent's mansion was infiltrated, the Duchess who was told beforehand by Annete, that they will be using her mansion, made sure that there was no one in it, so they were received only by the arrays of the mansion.
The Duchess showed her identity token and then the barrier let them in, of course Vincent, Aurora, Thea and Annete, all used their senses to inspect the place, just in case, once they were sure everything was fine, Vincent gave the greenlight and everyone entered the mansion.
The insides of the mansion were quite luxurious but not opulent, in fact there were some paints of Daphne in secession, showing how she grew up, since she was a little girl to her current appearance as a proper young lady.
Very much to the embarrassment of the first princess, her mother proudly showed them to the visitors, while the security head Mina went to the kitchen to prepare food for everyone, by Annete's request.