Relationships fail without having fault. My wife is from a culture much like you envision and at first was horrified at the bed-hopping she saw in the US. How

Relationships fail without having fault. My wife is from a culture much like you envision and at first was horrified at the bed-hopping she saw in the US. However, over time she's come to see that the old ways didn't actually work, AFIAK everyone she knew of her generation is still in their original relationships--but of those only one of those is still a meaningful relationship. All the rest are two people under one roof, neutral or hostile to each other.