I didn't really regularly watch PFB, so I'm not entirely sure, but, that sounds like an interesting follow-up episode to "April 9th". Even though Mr. Morris can still be seen in the background as an extra even after that episode (matter of fact, he was the one who mopped up Francine's vomit in "Vomitrocious").
It probably is a sequel to the events of April 9th like you said. I did remember seeing this episode, but I have to see it again before I made any further judgement on it. There are bits and pieces from that episode on Youtube.