Should she pray behind her husband who is clean-shaven and lets his garment hang down below his ankles?

No File Exists
Check below answers in case you are looking for other related questions:
An imam leads the Muslims in prayer and they dislike him, and he knows that
Ruling on the imam saying to the congregation, “Pray Pray like a man bidding farewell”

No File Exists
Related Answers:
Person for whom the prayer is obligatory praying behind one who is offering a naafil prayer
The electricity cut out during Jumu’ah prayer and they were not able to continue following the imam
If there are two who came late to the prayer can one of them be an imam and lead the other?
An imam leads the Muslims in prayer and they dislike him, and he knows that
Ruling on the imam saying to the congregation, “Pray Pray like a man bidding farewell”

Recommended answers for you:
Celebrating the night of the Isra’ and Mi’raaj
Attributes of the ideal Muslim husband
Sleeping after Fajr and ‘Asr
The reason why smoking is haraam
Praying for the newborn to be righteous in various ways