I was once at a party in another person’s house. This particular party was arranged by a neighbor and I was simply standing by the drinks (voluntarily, cause I hate interacting with people at parties)

While the adults would enjoy themselves at the dining area, the younger ones would just loaf around in the smaller eating area.

Now one of the guests had a very beautiful daughter, a bit exposing, but still quite the looker. She was a bit flirty and liked to just flaunt her looks everywhere. The older boys certainly didn’t mind her around, the younger ones just played together. Like I said before, I was just camping by the drinks station, day-dreaming and not really minding that girl’s presence.

That was when it took a different turn.

Strangely enough, the previously mentioned girl was very passive-aggresive to any girls close to her age being in the party. She would steal their spots, gently push them away. She was even a bit rude to some of them.

Then my sister was simply enjoying a conversation with one of my friends. My sister dropped her phone, the passing girl did a visible bump that caused my sister to fall over. That little “accident” caused my sister’s phone to break, and some of my sister’s drink to spill on her.

I don’t know why she did it, that was especially mean of her, to MY sister. I could clearly see a smirk of satisfaction on that shameless girl’s face. I was angry, especially when someone does that to my sister. Like I’m going to let that slide.

“This girl has crossed the goddamned line.”

And that was when I concocted my plan for revenge.

Knowing my sister’s kindness, she won’t even mention it to our parents. I had to take matters into my own hands, so I listened in on anything I could use against her. I heard her boast about her imported blouse from some famous brand in Europe and how she never stained it once. And I had thought of a way to get back at her.

I prepared a bottle of coke, carefully opened it and placed a little Mentos inside. I popped on my hoodie and I just waited by the for a perfect opportunity.

That opportunity arose when she herself went to the drinks. She smiled her cutest smile, while making cute gestures, I could tell that she was trying to charm me, she asked.

“Can you please give me a bottle of coke?” she said in her sweetest voice.

I played along with it and gave her the special bottle of coke I prepared. I made sure that I kept my face hidden via my handkerchief. I walked out the room, since the exit was conveniently nearby the drinks station and walked home (since it was rather near).

What my sister told me next was pure gold.

She said that the bottle of coke burst onto the girl’s expensive blouse, causing her to scream and cause a fit, demanding to know who gave her that drink. Since there were no witnesses, she couldn’t pin it on me, but she had this nagging feeling it was me. She relentlessly asked everyone if I was in the party, but since I rarely interact in parties, it was like I was never there.

Up to this day, I’m still very private about it, lest I pay thousands of pesos for that blouse I ruined. It was worth it, every action.

Thank Quora for Anonymity!