The answer

Carlo got home with a few minutes to spare, he went to Alex's room without delay. Once he entered he saw Alex doing his usual gun maintenance.

"You came back a bit earlier than I anticipated, as expected of my dad." Alex continued doing his regular maintenance of his guns while talking to Carlo.

"Alex I already know that Seiji Amamami is in this room, so are you going to give up now?" Carlo was looking around Alex's room, while Simon the head butler was outside the room, guarding the exit. A maid was also directly below the window of Alex's room, just in case, one of them decides in that route.

"Why should I give up? The bet was if you could capture the two Amamamis, before the time limit. So as long as you haven't captured Seiji Amamami, I can still win. Seeing as you have only a few minutes left, victory seems to be in my favor. Don't you think so dad?" Alex calmly replied to his dad, without even looking at him.