Omfg you are fine!! I did both - overstayed and worked unauthorized and guess what? Nothing. came up at the interview bc it is a non issue!! They didn’t even ask me about my overstay or unauthorized (illegal?) work.
Regardless if she had bo intention to leave it does not matter!!! If you want more info Dm me!!
she 100% has an easy case - not a messy case! File the paperwork and all is well!
100% this!!