My Obsessions - A Naughty Girl From A Conservative Indian Family

Hi, so this is my story of being a bad girl! I am obsessed with fantasizing about any and every couple having sex. No matter who it is I love masturbating imagining myself in the place of that girl.
A few details about me first.
Lets say I'm Shelly. Hindu-bengali.
I come from a conservative indian family. Have 1 elder sis 1 elder brother. Being the youngest I was a very pampered kid.
For the society I am a very good, cultured, well educated, brilliant and innocent girl. But I have a dark side too.
Alright, I'm 23y, 5'5" lean, gym fanatic. IITian(yes!), computer science, living in USA now.
I would like to think i am way hotter than an average indian girl. Was one of the most wanted girls in school and in college.
I'm a very naughty girl, take a lot of pleasure in doing things which are wrong illegal. I love listening to other people's stories, spying, fantasizing about them. That's how I ended on this website. I have stolen p***words, private pictures videos, read private chats of friends families and still do that every chance i get.
Enough about it, i want to write me whole life here.


Part-1
How it started-
My 1st encounter with sex was when I was 13y I saw my elder sister(7y older!) having sex with her bf. He was a family friend and came to our house for studies regularly. Everytime he came when my parents were not home my sis told me to go outside and locked the door as I "disturbed" them. Eventually I started hearing her moaning, when ever I asked she said she hit her foot on table or something. I grew curious and one day i peeked from a gap in the window and saw them doing it.
That day something changed in me. I then started to watch them every chance I had. This was like a couple of times a month. I knew what sex was from my girlfriends at school. I started to search about it on the internet also. Slowly, I understood everything they did and they did loooots of things. I saw my sister do things I couldn't even imagine at that time. Eventually I started fingering myself watching them and fantasizing myseld in my sister's place. I started doing much worse things. I read their chats from my sister phone, all the hot ones. We shared a laptop and I am a computer geek, i knew all her p***words, knew where she hid all their private pictures and stuff. I copied them and still have them. Whenever I was alone in the afternoon i saw those pictures and masturbated. So many things have happened in my life since then but I still sometimes like to see those pictures and pleasure myself. I also clicked some pictures of them once I got my personal mobile phone. I did some unspeakable things which I can confess only here. I found that that she was throwing their used condoms over the wall from our backyard, I sometimes looked for those and brought them back with me. I liked to smell it, squeezed his cum and play with it, taste it, yes I did these things. I used to rub that cum over my nipples and lips and masturbated with other hand. Sometimes when I saw my sis using her panties or handkerchief to make him cum or wipe his cum I took those from washing machine and played with them, smelled them licked them if I had a chance.
Did lots of more things which I will write some other day.
By the time I was 17 and was just about to go to college my elder brother also got married. I started getting horny fantasizing about them, how they would be having sex. Sometimes when they were not ay home I would go to their room and take some used condoms also. I know it was my brother's and I am NOT into i****t. But it just felt so good.
Did all this for 4 years till I went to college in another city. It was so wrong but felt so right.
Also, my sis just got married to the same guy 2 years ago. :)