Simple

After talking with the female servant about the breakfast, Isobel immediately made her way back to her room.

Since it was Loraine who personally ordered the chefs to cook something good and she also seems to have plans to invite them over, Falkor and the others cannot possibly refuse it.

Of course, even if they refuse it, nothing would really happen to them or anything of the sort.

However, if they refuse, it would cause Loraine to lose face and it might even dampen their relationship.

And once their relationship is dampened, one can guess what would happen to their deal regarding the core techniques of the Dazallona Family.

Well, this is just because Isobel and others are still not aware of Loraine's feelings for Falkor.

Even though Lara might know it by now, she does not have any plans of telling anyone about her mother's feelings for Falkor at all.