Can his wife uncover in front of his elderly uncle?

No File Exists
Check below answers in case you are looking for other related questions:
She formed a relationship with a man over the phone, and she wants advice
Ruling on male student shaking hands with a female classmate

No File Exists
Related Answers:
Does a Muslim woman have to cover her face in the presence of a gay man?
Ruling on shaking hands with the opposite sex
Is a woman’s voice ‘awrah?
She formed a relationship with a man over the phone, and she wants advice
Ruling on male student shaking hands with a female classmate

Recommended answers for you:
Etiquette of Eid
Celebrating the night of the Isra’ and Mi’raaj
Limits of looking at one’s fiancée and the ruling on touching her and being alone with her. Is her permission a condition of being allowed to look at her?
What are the rights of the husband and what are the rights of the wife?
Men’s dress code