Hakeem al-Ummah Hadhrat Maulana Ashraf Ali Thanwi (ra) said:

According to the Hadith, the person who guards the chastity of Muslim women,[then as a result of this],  his own women folk will remain chaste and honourable; if he respects his parents, his children will respect him.

This clearly indicates that whoever illicitly covets other women and does not preserve their chastity, causes the chastity of his own womenfolk to be at risk.