Britney Spears is reportedly disappointed with Jamie Lynn Spears more than ever.

The singer and "the Woman in Me" author is allegedly saddened that her sister Jamie Lynn Spears made the decision to leave "I'm A Celebrity," yet insiders assert that the singer "isn't surprised" by the "unprofessional behavior."

Just a few days after informing her fellow campmates that she felt "emotionally weak," Jamie, 32, abruptly quit the British competition series for "medical reasons," according to a statement released by show executives on Wednesday.

However, sources close to Britney, 41, have stated that Jamie Lynn had no intention of remaining on the show for more than 72 hours, which is the minimum duration needed to get the substantial payment for taking part.

'Britney is disappointed, but nothing surprises her anymore when it comes to her family's unprofessional behavior,' a source told DailyMail.com exclusively. 

"Jamie Lynn knew damn well going into this that all she had to do was last 72 hours and she was going to get paid. So that is what she did." 

"She never intended on staying any longer than this. This was just a quick paycheck for her - same as the Special Forces was."

Jamie earlier sobbed uncontrollably as she revealed that she had left Fox's Special Forces: World's Toughest Test after just two days. She gave her kids Maddie, 15, and Ivey, 5, as her justification for leaving at the time.

Along with her partner Alan Bersten, 29, she was the second celebrity eliminated from the current season of Dancing With the Stars. She also had a brief time on the show.

ALSO READ: Britney Spears' Sister Jamie Lynn Sparks Concerns After Leaving 'I'm A Celebrity' on Medical Grounds

The source continued, "Unlike her sister, Jamie Lynn does not see anything through to the end."

The source further opined that having a medical condition suddenly is an obvious excuse.

"Using a medical condition surely gets her off the hook without having to explain herself," the insider said. 

The amount of money she has received is unknown though and unless there is actual proof that Jamie Lynn is not suffering from anything serious, then people should just stop speculating. 

There are also some who think the show just really might be too much for the contestants and called for some investigation.

Show executives will be questioned about the exit, their thorough background checks prior to the premiere, and whether the stars were physically capable of handling the demanding schedule. Additionally, once the American actress left the show for medical reasons, officials at the channel claim that they are "struggling to keep up with the drama." According to one source, the popular show is in a "mess," and they fear that additional departures may occur in the next several days as the tension in the jungle increases. 

READ ALSO: Britney Spears Posts, Then Deletes, New Bizarre Dancing Video Showing Bandaged Finger 

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