They don't. Sounds like a problem you and she need to sort out - surely there's a compromise? Or at least you'd both understand how the other feels.
It is simply not true that a majority of the wives and their husbands' sisters don't get along and are mostly at loggerheads. Some women are like that whether they are sister-in-law or not. It has more to do with personalities and culture.
Women were supposed to hold themselves as reserved and loyalist and lower to their husbands. They did the majority of household chores and were in no way supposed to show wit.
husbands' ex: All of the women have their husbands' money.
Because women are indeed property of men even today. It is because majority of men enjoy dominating their wives and majority of women enjoy submitting to their husbands. Something biological I guess. Women talking like a feminist change after finding a loving dominant partner.
their husbands, their husbands could do anthing to them basically and if they were not to obey they would be beaten.
It is a kind of respect but only of the learned and worthy husbands.
No.
Several women are known to have fought while disguised as men. Some took the identities of their husbands, fathers, brothers, or sons in order to fight.
Possibly many did when husbands were away for years at a time.
She is polyandrous.
Everything
Cheat on their husbands, we hope.