I just hope Felicia didn't sign a prenup...I hope there's more behind Elias' invitation than just another sadistic impulse from Kat towards Felicia.
It's just that most of Felicia's moments involve cucking her husband (interviews, photo shoots, Edwin's visit to their home)
Besides, Elias himself is a pompous, narcissistic dude who may react questionably to the fact that his wife (even if he has no feelings for her) sucking and fucking at stage for the amusement of rich old perverts.