A Younger Brother comes into town and stays with a married Older Sister because he has an extended project at the town. In between playing with his nephews and nieces, the Brother realizes something's not quite right in his Sister's marriage. He notices Sister dressing sexily for the benefit of her Husband but the Husband barely takes notice. Brother compliments Sister. Sister says it's inappropriate for Brother to compliment her but is flattered. As time passes, Sister increasingly opens herself emotionally to Brother.
On a night out after work, Brother finds out that Sister's Husband is cheating and carrying on an affair. He tells Sister about this. Sister composes herself saying that she'll take care of things after Brother leaves. In the meantime, Brother thinking that Sister deserves better begins to get the idea that he might be able to get Sister in bed with her.
The dynamic at work is at follows:
-The Sister is in an emotionally and sexually unsatisfying marriage. She is making one last ditch effort to get her husband's attention again. She begins to fall for Brother's advances because he's the one taking notice of her trying to look more attractive, because of the emotional connection she's making, and also because the marriage has become sexless and she's horny.
-Brother secretly lusts for Sister but whatever desires he has is just fantasy. He decides to seduce Sister out of a sense that his brother-in-law "doesn't deserve" Sister.
I used a Younger Brother seducing Older Sister pairing here. But I think it can work with a Younger Sister trying to do the same thing to an unhappily married Older Brother.
On a night out after work, Brother finds out that Sister's Husband is cheating and carrying on an affair. He tells Sister about this. Sister composes herself saying that she'll take care of things after Brother leaves. In the meantime, Brother thinking that Sister deserves better begins to get the idea that he might be able to get Sister in bed with her.
The dynamic at work is at follows:
-The Sister is in an emotionally and sexually unsatisfying marriage. She is making one last ditch effort to get her husband's attention again. She begins to fall for Brother's advances because he's the one taking notice of her trying to look more attractive, because of the emotional connection she's making, and also because the marriage has become sexless and she's horny.
-Brother secretly lusts for Sister but whatever desires he has is just fantasy. He decides to seduce Sister out of a sense that his brother-in-law "doesn't deserve" Sister.
I used a Younger Brother seducing Older Sister pairing here. But I think it can work with a Younger Sister trying to do the same thing to an unhappily married Older Brother.