A GIRL FOUND OUT THAT HER SISTER WAS SLEEPING WITH THE HUSBAND OF THEIR ELDEST SISTER

A Redditor shared a family drama, about her older sister and the husband of their eldest sister, in the r/relationship_advice subreddit. The OP explained she heard her sister and the husband of her eldest sister while they were whispering, about their affair.
The 14-year-old OP shared that she has two older sisters, 18-year-old Abby and 24-year-old Claire. She explained that they went to a family vacation along with her sisters and the husband of her eldest sister, 32-year-old John.
OP shared, her sister was not feeling well at night, and she wanted to go to bed early. As OP’s parents had went to their bed too, the OP, her older sister Abby, and their brother-in-law John was at the room. They were sitting on the sofa, while OP was on a recliner. They were drinking.
After some moments later, they started to talk about with some sexual context, as they thought that OP was sleeping too. As OP was shocked, they left the room after a little while later. OP stated their trip was going to last for four days, and she stated that she doesn’t know what to do about the situation.
A while later, OP gave an update on her post, as she explained that she talked with her parents about the issue, and a huge fight break out in the family.
OP shared how sorry she was, and she is thinking that she ruined her family with the things she heard, and talked to her parents about. But OP also stated, her eldest sister needed to know the affair her husband and their sister were having.
After the parents learned about the affair, they lost it, and kicked Abby out, after they threw her clothes out.
Then, OP shared that she is still feeling sad that she ruined the family, and wished she never witnessed the conversation her sister and their brother-in-law had.
What do you think? Let us know.