My sister went to my rich boyfriend’s place and told him to “try it,” so I exposed her.

A Lifetime of Competition and the Ultimate Betrayal

My sister showed up at my boyfriend’s apartment in a tight dress and told him “If you ever get bored with my sister you know I’d treat you better.” When I confronted her she smirked and said “You’re overreacting i was just testing him.”

I stayed silent that was 9 months ago. This morning she was standing outside my apartment in tears. My sister went to my rich boyfriend’s apartment and told him to try it with her so I exposed her to our parents.

I have been dating my boyfriend Adam for almost 3 years. He’s kind, hardworking, and happens to be very successful in his career. He earns well, but he’s humble about it.

My sister Mia has always been competitive. Ever since we were kids, she’s had this need to win at everything, especially if it meant taking something from me. When we were younger, if I got a new toy, Mia would pout until my parents let her try it, then somehow it would become hers.

If I had friends over, she’d insert herself into the group and try to outshine me, usually by making me look silly. I still remember when I was 14 and had my first crush. I told her in confidence.

The next day she showed up to school wearing her nicest outfit, sat next to him at lunch, and giggled at everything he said. She later bragged to me “He talked to me more than you guess he likes me better i thought she would grow out of it.”

She didn’t. When I first introduced Adam to my family, Mia’s eyes lit up the moment she saw his car. She kept asking him about his job, his salary, and his apartment.

I laughed it off, but inside I felt uneasy. Over the next few months, whenever Adam came over, Mia would hover. She’d wear low cut tops, flip her hair and say things like “Wow I wish I could find someone like you.”

Sometimes she’d jokingly ask “If you and my sister ever break up you’ll call me right?” Adam would just laugh awkwardly and change the subject, but it made me uncomfortable.

When I told Mia to tone it down, she rolled her eyes. “Oh my god you’re so insecure i’m just being friendly not my fault if your boyfriend likes talking to me.” Things exploded 2 months ago.

Adam and I hosted a small dinner party at his apartment. Mia came dressed like she was going clubbing—skintight dress, high heels, perfume so strong you could smell it from across the room.

The whole night she was glued to Adam. She’d touch his arm when talking, lean in close when he spoke, and at one point she whispered something in his ear that made him visibly uncomfortable.

I pulled her aside and asked her what she was doing. She laughed. “Relax i’m just making conversation you should be thanking me for keeping your man entertained.”

I wanted to kick her out, but Adam asked me to let it go so the night wouldn’t be ruined. A week later, Adam told me something that made my stomach drop.

Mia had shown up at his apartment unannounced while I was at work. She brought a bottle of wine and told him she needed someone to talk to.

Adam said she sat next to him on the couch, crossed her legs, and started talking about how lonely she was. Then she put her hand on his knee and said “If you ever get bored with my sister you know I treat you better.”

Adam told her to leave immediately and made it very clear he was not interested. He also told me right away. I called Mia that night and asked her if she had lost her mind.

She didn’t even deny it. She smirked and said “You’re overreacting i was just joking if he didn’t want me there he could have kicked me out.”

When I said Adam did kick her out, she scoffed. “Whatever maybe I was just testing him you should be glad he passed.”

Testing him—that was her excuse. I told her she was pathetic, selfish, and disgusting for trying to sabotage my relationship. She shot back “You’re just mad because you know I could take him if I wanted to you’ve always been jealous of me.”

That was it for me. I told her we were done as sisters. No more calls, no more visits, no more pretending we’re family.

She laughed like it didn’t matter, but I could tell my words hit her. When my parents found out, they begged me to forgive her. My mom said “She’s your sister you can’t just throw her away over a man.”

I told her “This isn’t about a man it’s about respect.” And she’s never respected me.

Of course, Mia told the whole family that I’m overly dramatic and trying to ruin her life over nothing. She’s been posting vague quotes on Facebook about fake people and how jealousy destroys relationships.

Here’s where it gets good. One of Mia’s friends who I barely know sent me screenshots of Mia bragging in a group chat about what she did. She literally wrote “I could have had him if I wanted she should thank me for not stealing him.”

That same friend then sent those screenshots to my mom and dad. My mom called me crying, saying she couldn’t believe Mia would actually admit that. My dad hasn’t spoken to her in weeks.

And Adam? He told me this whole thing just proved how lucky he is to be with someone who doesn’t play games. We’re stronger than ever.

Mia is blocked on everything. She’s been trying to call from unknown numbers, but I’m not picking up. My parents have finally stopped pushing me to make up because now they know the truth.

She thought she could play her usual manipulative game and win, but this time she lost and everyone saw it happen. Two weeks passed without any contact from Mia, and I started to think maybe she’d finally gotten the message.

I was sitting at my desk reviewing quarterly reports when my phone buzzed with a call from building security. The guard’s voice was tense as he explained someone claiming to be my sister was in the lobby demanding to see me.

My stomach twisted into knots as I realized Mia had found my workplace and was actually here. I told security not to let her up under any circumstances.

Then I remembered our building had a security app that let employees view the lobby cameras. I opened it on my phone and there she was.

She was standing at the security desk in a bright red dress, holding what looked like a gift bag with tissue paper sticking out the top. She was gesturing wildly at the two guards, her face getting redder by the second as they kept shaking their heads.