I (26F) am currently being treated like a pariah by my entire family. My sister, Maya (29F), was supposed to marry Mark (30M) in three months. Mark is a nurse and quite literally the kindest man I’ve ever met.
For the last six months, Maya has been “buried in work.” She’s an associate at a big law firm and claimed she was gunning for a promotion. She was “working” until 11 PM or midnight almost every weeknight. Mark was amazing—he took over all the cooking, cleaning, and wedding planning so she wouldn’t be stressed. He’d even drive to her office at 10 PM just to drop off a coffee and a snack, though she always told him to just leave it at the front desk because she was “too busy to come down.”
The truth came out two weeks ago. I work in the same district. I saw Maya’s car at a hotel several miles away from her office during a time she was supposedly in a “late-night briefing.” I followed my gut and waited. I saw her walk out with a guy from her gym.
I confronted her privately the next day. I expected her to be ashamed, but she was cold. She told me, “I’m just getting it out of my system before I settle down with Mark. If you tell him, you’re destroying a marriage before it even starts. Do you really want to be that person?”
I tried to stay out of it, but at a family dinner last Sunday, Mark was talking about how he’s worried Maya is overworking herself. He actually said, “I just want her to know she doesn’t have to carry the world on her shoulders for us.”
I couldn’t take the guilt. I pulled Mark aside after dinner and told him everything. I showed him the photo I took of her car at the hotel.
Mark ended it that night. He didn’t just postpone the wedding; he moved out. Now, my parents are calling me a “vindictive snitch.” They say Maya was going to end the affair anyway and that I “ruined her life” because I’ve always been jealous of her. My sister sent me a text saying she will never speak to me again and that I’ve “shattered the family.”
My mom says that in our family, “we protect our own,” and that I should have let Maya handle it. Now I’m sitting here wondering if I should have just kept my mouth shut.
AITA for “betraying” my sister to tell her fiancé the truth?