Despite having a few scenes in which she appears in the episode (albeit briefly), Hayley Smith has no lines.
When the hot tub salesman is researching articles with the microfiche, the obituary for Anne Flemming can briefly be seen; Francine stumbled across this same microfiche article researching the Ladybugs in the season 2 episode "Not Particularly Desperate Housewives."
Steve: Gee, Dad. I'd like to get in the hot tub too. But I can't 'cause I'm pretty sure my parents (bleep) in it last night!