It wouldn't surprise me that Joyce et al had couriers and hotel rooms booked for the preceding couple of weeks also. I reckon they were just waiting for the best time.
Either way though, if it was pre-planned it's a massive act of bastardry with multiple layers of duplicity, misinformation, subtefuge, etc; and if AJ made the decision 'solely' on the Saturday morning then it shows a fundamentally dysfunctional and highly dangerouse decision making process at play. Chose your poison.