Minos had already planned his departure in 100 years, but he hadn't considered that he would be away from his family on this journey. Therefore, Abby and the others saw no problem with his plan and were already preparing for such a future.
Their situation in the guild was already good, so in 100 years, it should be better for them to think about such a match.
Not only that, but as far as Minos knew, some elders of Armhands had interests in Uzira, so he could take his family to the primordial continent for a mission, not just a personal trip.