Telling them her decsion
The major problem for her was seeing Malek and Celeste. If she returned for Court lady training, they would be aware of her presence. She would also receive a lot of attention from everyone else such as the servants wanting to see the demoted crown princess now take on the lower role of a court lady.
Despite all that attention Tanya accepted that she was now just an ordinary noble lady so her previous status as the crown princess didn't matter anymore.
The position of court Lady was a very respectable role, if she did good work in the palace she and her family would be rewarded.
She could possibly restore the honor of her family after the embarrassing turnout of her losing her position. Despite what Taron and Madea had told her about her not having embarrassed the family she certainly felt like she had and all the other nobles did too as they laughed at her. She thought of Lady Maruz's party at that time.