Then Bud becomes a dictator with her, and blackmails her, because he saw her burying the evidence in the back yard.

She broke the pen in the foyer area, by dropping it on the floor and accidentally stepping on it. The pen is leaking ink on an area rug, clearly in the camera shot.

Yes, Betty eventually wonders what happened to her pen, but why didn't anyone notice the ink all over the rug?

In my family, something like that would have been discovered, probably by my dad. There would have been hell to pay...hell.

Really the kid was horrible. They went after Bud for blackmailing her but she probably got no punishment at all.

Then there was the time Bud started the lawn mowing business and she was the president of the "corp." She takes the profits and buys her boyfriend a model boat.

Bud calls her a crook (which she was--she was old enough to know better) and HE get yelled at.