Why do sisters mostly get along with their sisters' husbands and will be glad to see their sisters happy with their husbands but same sisters mostly trouble their brothers' wives and jealous of them?

This question makes unfounded assumptions about sisters' hate for in-laws. Some sisters may hate of their husband's sister, but many do not. It is misleading and incorrect to presume that all sisters hate or do not hate one or another type of in-law.