No, of course not. IMO, she said it smelled like a dead body had been in the car because that is how it smelled - it was some time afterwards that denial set in. It's very clear to me that Cindy is completely traumatized. Considering that, I can make allowances for her odd behavior. I would hope that no mother here would be capable of doing what people expect of Cindy -- accept immediately that her daughter killed he own child and tossed the baby's body in a swamp. I'd hate to imagine what type of family dynamics would have to go on for any mother to accept that without question.