Sidi wa sanadi Hazrat Mufti Mohammad Taqi Usmani sahib db said explaining a malfooz of Hakeemul Ummat ra,
As an individual’s taqwa (Allah swt’s fear) increases so does his love for his wife enhances.
This is because he is aware of the obligations imposed by Allah swt regarding her rights on him. He realizes that he is bound to undertake them. So with this intention when he fulfils her rights he gets reward (thawab, also).