Sammy

We are finally having an holiday, as soon as we arrive in the hotel, dad told the whole family to prepare for the beach. I have this new bikini that I love, I'm happy to finally have an occasion to wear it.
Now the next step is simple: Sunbathing.
Or at least I tought it were simple, I never thought about my little brother who like to command me every time he has a chance.
"Come Sammy, let's go in the water, I wanna play"
"Go play alone, I need a tan right now"
"Oh okay, then how about I drag you from this?"
Then I look at my chest his hands are on my top bikini strings, ready to strip me every moment.
"Wait wait, what are you doing"
"Now let's gooo"
"Don't pull, don't pull!!"
I try to pull his arms, but he is clearly stronger, I'm running with him to the water going he doesn't suddenly pull my bikini.
The worst part are our parents that look at us with this nostalgic smile like if they are looking at some kids play.
Things like these happens frequently and whenever I try to ask help to mom or dad the answer is always
"Sammy, you are the older sister. You have to stand for yourself, you can't let your younger brother to have control on you. For god sake you have 10 years of difference, how can a 18 years old boy bully his 28 years old sister? You are clearly doing it on purpose"

He ran so much that at some point I could see our parents anymore. Then he decide to stop pull, exactly in front some guys that were playing volleyball on the beach.
"Sis, I'm sorry... I wanted to look tough in front of mom and dad, I probably exaggerate this time" then he hugged me.
I didn't knew how to react, I had the whole volleyball team behind me looking at us so I decided just to hug him back. But then
"GUYS LOOK HERE"
with his hands he wasn't hugging me, he had a strong grip on my bottom and gave me one of the worst wedgie of my life.
"NOOO!"
I was screaming my bikini bottom was high as my top, all the guys were looking at my ass.

"Matt stop please, this is not funny"
That moment the top strings that were pulled till that moment, gave in and fell. The wedgie were lifting me up, I had to hold his shoulder to keep my balance, that helped him to lift me even further, my chest was over his head and everyone were looking at us at this point a few guys were already doing photos and videos. Then he suddenly he dumped me and ran away.
I was in the sand, half naked, with my bottom up my ass.... I freezed for a minute then I started to run back too. I knew I couldn't even speak about what happened with mom and dad otherwise they would say that it's my fault to let my little brother to do what he want and that I end in these situations on purpose.