In an email sent at 9:50 p.m Tuesday, FF assured me that he and the GF will be at my place at 4:00 p.m. on Saturday to commence preparation of the meal. And that everything is under control. He also apologized if his lack of communication had caused me any "stress".
(He added that he now understands that the expression "explosive diarrhea" is literally true. Should that really have been in the same email?)