Whitney talking about her parents:
"I just need them to take better care of themselves"
OH YES BECAUSE YOU ARE THE PINNACLE OF HEALTH WHITNEY
"But we don't talk about it"
Yeah, kind of like how your parents could lecture you about how unhealthy your weight is as often as you lecture them about their health issues. BUT WE DON'T TALK ABOUT IT...lol
"I may be super fat but I am FIT"
She thinks if she can lift a few reps of a heavy weight, that equals fit. Yet she has to go down stairs one step at a time like a toddler, still can't run, and gets out of breath just walking a short distance. Whenever we see her "working out", it's only lifting weights, never cardio.
Also, it sounds like her parents are on top of their health. Yes, when people age they tend to get health problems. But her parents go to the doctor, acknowledge the issues, and deal with them. Still, Whitney has to lecture them for eternity just so it makes her morbid obesity seem less of an issue.
ETA: I love how earlier in the episode Whitney is worried the nice table setting will intimidate Chase, then during the dinner criticizes his manners constantly.