I believe I do have a timeline of events that you might find illuminating.
On the evening of Jerry’s 50th birthday, he and his wife, Hilla, reflect on the events of the day.
Although he enjoyed the day, Jerry feels a tinge of melancholy. His feelings were unintentionally hurt by a ‘What would Dad say?’ round in a quiz that Deborah had composed. He worries that the high scores in the round indicate that he has become a “predictable old fart”.
Hilla comforts him by saying that, although they may know what he might say, they could never predict what he will do next. She cites, as an example, him training crows to fetch batteries.
Feeling better, Jerry bids her goodnight. As he does so, she intones “don’t let the bed bugs bite” along with him, but he protests that that doesn’t count.