Constantly lying and breaking promises can do it. People won't trust you anymore and drift away. Also, being too judgmental and never giving them the benefit of the doubt can push them away.
If your story is full of boring details and has no interesting plot, it's likely to turn people off and make you lose friends.
One possible consequence is the breakdown of the friendship. It's hard to imagine a situation where a friend would be okay with such a betrayal. Another consequence could be family turmoil. The friend's family would likely be in chaos, with feelings of anger, disappointment, and confusion.
This is an unethical and inappropriate situation. One possible consequence could be the breakdown of your marriage. Your wife may feel violated and disrespected, leading to a loss of trust and love in the relationship. Socially, it can also lead to a lot of judgment and ostracism from your family and other friends who uphold traditional values.
One possible consequence could be the breakdown of the marriage or the primary relationship. Trust is severely damaged when such improper behavior occurs.
One possible consequence is social judgment. People around them might view their activity as inappropriate or immoral. Another consequence could be legal issues if the story contains pornographic content. In many regions, creating or sharing explicit sexual materials is against the law.
One major consequence is the severe psychological trauma for the victim. They may develop trust issues, not only towards the friends involved but also in general relationships. Depression and anxiety are also likely to set in. Socially, they might isolate themselves as they are ashamed of what has happened.
It is completely inappropriate for a wife to strip for friends. This violates the boundaries of a marriage and basic social ethics. It can lead to a breakdown in the marriage relationship, as it is a form of infidelity in an emotional and physical sense. It also makes friends uncomfortable and can damage the wife's own reputation severely.
The blackmailer could face legal trouble. Blackmail is illegal in most places, so they might end up in jail or with a criminal record.
In Snapchat, the act of watching a friend's story is mostly private. There's no direct way for your friend to know that you were the one who watched their story among all the other viewers. But be aware that if you screenshot a story (unless it's a public story where screenshots are allowed), the creator will be notified. So, as long as you just watch and don't screenshot or do anything else out of the ordinary, you can watch all your friends' snap stories without being noticed.
There could be serious legal consequences. It could be considered rape or sexual assault. Socially, it would likely lead to the breakdown of relationships, not just between the husbands and wives, but also between the friends. The families of those involved would also be deeply affected.