A man CANNOT love his mother and wife in the same way because the two relationships are so very different from one another. Either of the roles (mother and wife) cannot be replaced with the other. Nor can the roles be compared.
And that's a concept that MANY mothers-in-law don't seem to understand. The issue is not only confined to Desi MILS and includes other races as well. However, when you read the numerous threads on toxic in-laws in the Life/Relationships forum........it just seems like an epidemic in the desi culture.
As far as the question of this thread is concerned: A guy's love for his mom includes the BASIC foundation of** RESPECT*. The quality is a fundamental requirement in **ALL* relationships. And if a guy can show RESPECT **to his mom and sister.............then he will hopefully also show basic respect to **OTHER women as well. However, keep in mind that there are exceptions to the generalization. For example, a guy's mom and sisters might be evil and dysfunctional. He may choose to maintain a safe but respectable distance from them. In this scenario........the generalization may not apply.