There's a long list of stuff me and my sister and I have done, but one of the main things that started it was when I catfish her while on holiday. We were sharing a room a couple of rooms down from our parents, I made a fake snapcaht account and pretended to be a guy called Zack. I knew my sister was single at the time and was getting back out there. So I started general chat with asking where she was from and what she liked. Eventually, the chat went sexual after a few hours of messaging. I asked how many people she had slept with, and the answer was 1, which I was surprised at as I knew of 2 boyfriends she had previously had. After a few more juicy messages about how good looking she was, I sent a picture of the top of my boxers (previously saved pictures as I was sat meters from her) she replied with saved pictures aswell of her bra and thong. I was getting so hard I had to go into the toilets to reply to her. Once on the toilet, I sent a picture of my dick and she replied with damm that would be the bigger than my exs. Obviously, I came there and then straight into the toilet. She then messaged that she would send some pics later in the shower as she was sharing a room with her brother. Once I sat back down, I started to ask her about her brother (me Obviously) she said that he was a year younger. I asked the dangerous question of do you have any fancies. She opened the message but didn't reply for about 15 minutes, I thought I'd blown it gotbto weird too fast. Eventually, she did reply once I did have a dream that her picked me up from a night out, and I repayed him with a blowjob. This was music to my ears as she had asked me to pick her up in a week or 2 from a night out. Back in the room, she went for a shower and sent a lovely nude picture in the mirror. I then asked if her brother had seen her naked she said I think he's seen my tits once when I came out of the bathroom."" Which I had permanently engraved in my head. I tried to get her to flash him again and see what he did. When she came out, she said it was all yours for me to have a shower. She then stood on her towel and flashed her ass and looked so juicy and round. While in the shower, I sent her some dick pics, which she liked, and she replied with videos of her fingering herself naked and in her pyjamas l. However, in one of the pics, there is a shampoo bottle, which she ended up recognising. She banged on the door, not very happy with me, believe it or not. The lock wasn't very good, so she quite easily got in, and I'm stood in the middle of the room with my dick fully erect she shouted at me but didn't once look at my face. She calmed down a bit and got into bed she then messaged me on the Zack account and said, "Can I sleep in your bed tonight?" I, of course, I said yes. I was just sleeping in my boxers, and she was in pyjamas. While she was next to me, I took my boxers off and rested my dick on her ass she then pulled her pyjamas diwn and pushed it between her cheeks she said no sex but I'll wank you off if you don't tell anyone. She wanted me if each night we were there, I played with her tits ass and fingered her. I think it's only a matter if time till she gives me a blowjob.