I was 14 when this happened and my cousin was 11.
It was weekend and my aunt and uncle decided to have a romantic one so they rented a house somewhere and dumped their twins at my place.
The Twins where Tim and Amely.
Tim was a bit on the skiny side but he was almost as tall as me(but thats more because i'm so short then because he's tall) he had brown hair and a few freckless although not very many. He was very bratty just like myself so we got allong great

Amely looked different she had blond hair instead of brown and she was a bit taller then him despite that she often got teased to hell and back by tim who was stronger then her.
Tim and i where watching TV Tim wanted to watch pirates of the caribean but i wanted to whatch something else and refused to give him the remote.
''I'm bored'' he whined.
''Your always bored just watch''
''But this is a boring show'''Tim complained.
'''Shut up Tim''i said
''There must be something not boring thing i can do'' after saying that Tim watched out of the window and saw Amely coming home he started grinning evily ''i know''
Tim rushed downstairs and i was prety sure i heard Amely screaming but it stopped after a few seconds so i didn't care.
When my show ended i went downstairs because Tim had been awfully quit.
When i came into the living room i saw Tim grinning with a roll of duct tape in his hand. Next to him was Amely taped up!
Her arms where taped behind her back and her legs where taped together but she was still standing and could only move by jumping a little .
''mmpphhh!'' she probably asked me to help her but she was gagged.
''Tim?'' i asked a bit amused.
''Uh....she asked me to cover her in tape!'' Tim quicly lied'
''MMMHHGGG!'' i could see from Amely's reaction that she did not want this to happen to her.
After forcing Tim to untie Amely put my arm over his shoulder ''You know what i'm going to teach you how to tie her proparly''
Tim was really happy when he heard this ''cool can we start now''
I did't know it yet but he did not need someone to teach him tie ups. He had already been practicen by tying his friends and sister up.
''Alright kid put your arms behind you'' Tim obeyed and i took some rope to bind them togheter i also hogtied him.
''Too tight'' i asked ''nah'' he replied.
''Alright now that your tied up i need something to shut you up i cant have a brat like you scream trought the whole street'' i said and i took the tape Tim used to tie up Amely.
''Why would i scream'' Tim innocently asked.
i grinned a bit ''you'l see''
I took some strips of tape and taped his mouth shut.
''mmgghh'' Tim was now playfully testing his bonds and gag.
He looked rather cute and his gag also served to keep him from being annoying.
''Now that your tied up i can do anything to you'' I took off his socks and Tim immidiatly made some fearfull mmpphh's because he knew what i would do.
I knew that Tim was super ticklish so i tickled his feet.
Tim made some cute and helpless whines behind his gag untill i stopped tickling him and untied him so i could show him the next posision.
''Geeh you did't have to do that to me'' he complained after he ripped the tape from his mouth''
I know you tickle you sister every day so you don't have the right to complain'' i playfully lectured him
Tim pouted a little ''Fine'' then he started to grin ''Can i tie you up now''
''No you can't besides i'm way stronger anyway'' Saying this proved to be a baaaaad move.
''we'l see about that!'' Tim jumped on me and to my surprise and horror he managed to overpower me (easily) and forced me to the ground. He held me in a headlock untill my desperate struggle ended .
He took the rope and tape from my hands and tied my arms and legs togheter

I tied one last effort to call for help 'mommppff! Tim realised i tried to call for help and quicly clamped his hand over my mouth and gagged me with the tape.
''Sshhh'' he said and he placed his finger over the tape gag ''remeber what you said? we don't want a brat to scream trough the whole street.
Now a was bound and gagged and at the mercy of my youger cousin! who was meant to be my little prisoner.
This was the start of a tie up that would ladt nearly two days

To be contineud.