As Jessica Simpson mentioned, the younger celeb already had her own reality series, The Ashlee Simpson Show, over a decade ago; she had a couple of appearances on Newlyweds: Nick and Jessica as well.
Ashlee Simpson is apparently confident enough in her marriage and her current life at the moment to let the cameras capture whatever they have for the six-episode “docu-drama.”
Jessica will indeed return the favor by appearing on a couple episodes in the back half of Ashlee+Evan, so it’s not as though she’s completely against any and all appearances.
Rather, it sounds like Jessica is just more happy with being able to take her mic off and walk away from the cameras without someone shoving a contract in her face and reminding her what she signed up for.