What is the ruling on a woman praying alone, separate from her husband, who prays quickly and causes her to miss the Tasbeeh and Du'a?

If the husband performs his prayer quickly, yet still achieves the minimum tranquility required, his prayer is valid, and it is permissible to pray behind him. By doing so, the wife attains the virtue of congregational prayer. If the wife prays alone, her prayer is valid. The wife should advise her husband on the importance of perfecting the prayer, having devotion (khushu') in it, and avoiding excessive haste that compromises it.