Everyone caught my sister pleasuring her self and she thinks it was my fault.

I (m22) used to share a bedroom growing up with my little sister (f16). We never had an issue with sharing a room, leaving the door unlocked, leaving the computer open, etc. Neither of us had a problem with that. When I went to uni, I moved back home for the summer and I shared with her again for last year of this. We lived in a small terraced house, so we could always hear noise. We didn't have a problem with it.<br><br>I always been the caring older brother. I helped her with her school work, I stood up for her, I'd help her with anything. I'd never let anything bad happen to her. Last year when I moved back home and we shared a room again, I noticed she was different. She had blossomed and became her own person. I thought that was amazing as she used to get called a tomboy (don't really know why). I started to feel something for her, and as I had never felt these feelings, I didn't really know what it was. It wasn't until I saw her in a skirt, and I found myself staring at the hem of the skirt and down her legs. Then I started to feel even weirder. I didn't know what to think of.<br><br>I started to leave her alone a lot more. I started to put locks on my laptop, put a password on my phone and started to close my wardrobe when I left the room. It was purely because I was scared of how I felt. I didn't want her to find out and her not to trust me again. I didn't realise how much she could hear my noisy until a friend said to me that she could here me doing everything. She could hear me when I pleasured myself, I could hear her when she did the same. I didn't know and that's why I made myself more private.<br><br>She's recently gone back to sixth form for the first time in 2 weeks. When she went back, the girls started talking about how they had to move into a different flat because of pests. She told me that her new flatmates are the same from the old flat, it's just the two bathrooms and two kitchens are swapped around. She was just telling me how different the new kitchen felt to the old kitchen. She said that the ovens and the fridges were diametrically opposite to what the old one was. She said that the new flat was laid out slightly different. So I asked her how the new flat was laid out. She started to talk about (with gestures) where everything is in the new flat, in comparison to the old one. She started to talk about the different bathrooms. She said that the ones in the new flat are massive, in comparison to the old flat. I asked her how big it was in comparison. Then she just froze.<br><br>She started to panic. Then she got up off the sofa and went to the stairs. I asked her what was wrong but she ran down the stairs. She said it was okay and she had just been sick. She didn't eat her dinner. She's been avoiding me ever since and I have no idea what I did wrong.<br><br>&#x200B;