What should one do if someone comes to mind during prayer, recitation of Qur'an, or Dhikr, and one feels at that moment that one is worshipping that person alongside Allah? And are one's prayers accepted?

[She] is afflicted with waswasa (whispers of Satan or obsessive thoughts), so it is dispelled from her, for Allah does not hold one accountable for waswasa. The feeling of not being accepted indicates a lack of conceit regarding one's obedience, which is commendable. They cite the Almighty's saying: "Indeed, they who are apprehensive from fear of their Lord And they who believe in the signs of their Lord And they who do not associate others with their Lord And they who give what they give while their hearts are trembling that they will be to their Lord returned It is those who hasten to good deeds, and they are foremost in them." This is praiseworthy if it motivates diligence; however, if it prevents one from acting, then it is waswas. One must remember the vastness of Allah's mercy and grace, for He is "the Most Generous," and "the Most Gracious, the Most Merciful." It is also advised to persist in supplication and humble entreaty, and to consult a psychiatrist.