Mr. Monk and Mrs. Monk - S4-E6
Continuity mistake: When the Trudy impersonator is talking to Janice's father in the diner, the venetian blinds on the window to his left alternate between raised and lowered positions as the shots change. (00:06:50)
Mr. Monk and Mrs. Monk - S4-E6
Continuity mistake: When "Trudy" walks into the coffee shop, Natalie flips the picture over onto the counter. In the next shot, she's holding it against her body. It's back on the counter the next shot.
Answer: Through the entire show, I don't recall her ever mentioning another job. The two explanations I had for being able to afford those cars, was there might have been a life insurance policy after her husbands death (or Mitch left her quite a bit after he died). The other may have been she had accepted some money from her family willingly or unwillingly asked for it. But in truth, I would imagine it was for product placement in the show. Most shows like Monk tend to keep the characters moderately wealthy or financially healthy, so they can insert products or items for the characters to use. Phones, food items, cars etc.
Lummie