My big Brother

I've just the one brother, two years younger than me and he has always been weedy shorter than me skinny and not into sports at all. Very smart, caught up to me in our schooling, it was a bit of a shock to me at first that I would've my younger brother in the same class myself. Not that I'm dumb, I do well at school, just my brother is gifted I was told. Being smaller made him a target at first, but I'm his sister and after I het one of the bullies with my book laden backpack knocking him to the floor. They stopped picking on him, the bully wanted to take it further with me, but my boyfriend at the time, Stepped in and the bully back off. We went on to college together and my boyfriend moved on, and I graduated the same year my brother, he would've moved further ahead of me, but our parents wouldn't allow it. My brother got headhunted by a large corporation, who also offered me a job, mainly because it was the only way to get my brother to move interstate away from our parents. I could've got the job on my own merits, but I would've been one of a number with the same qualifications. My brother was what they wanted I was the means to get him, always working close by and living in the apartment provide by the company for him. It could be disheartening for some people, but I see it as a chance to prove myself without the hassle of just getting a start with the company. I've earned my own promotions, but I'm kept close to my somewhat shy brother. Last Christmas we were returning from visiting our parents, slowed down by a traffic accident and then it started raining heavily. Not happy with driving in heavy rain we decided to stay overnight in a motel, got the last room. It only had a double bed and mirrors on the ceiling, no problem for us. We'd dinner at a diner, my brother went to shower before bed, and I was reading text messages. Then needing to pee, I just walked into the bathroom, not caring about my brother in the shower, I'd seen him many times growing up naked so what could've changed. He wasn't concerned by my entering, as I sat on the toilet, I saw him thru the clear glass. What I saw shocked me, my weedy brother still hadn't filled out much looked like he'd three legs. His cock was hanging down between his legs and looked at first glance to go as far as his knees. It didn't the glass was a bit foggy, but it did about halfway. Not aroused just hanging there, the men I've been with were only about half my brother's length on the slack. I recovered from the shock, but got aroused, having no boyfriend at the time might have been the reason, as I do like sex. So, on impulse I stripped naked and joined my brother in the shower. He was of course shocked, but he soon got over it. Especially as I had started stroking his cock, more confused by my action than anything else, I think. I mainly wanted to see his cock erect, when it was, I really wanted to try it, I always keep up to date with my precautions. It was easy getting my brother fuck me or rather me fuck him. Twice we fucked since our return I regularly join him in his bed, I've taught him to please me, and he was a very good student like he always has been. Weren't in any relationship other than our mutual satisfaction. Perfect arrangement, come home after a failed date and fuck my brother to get satisfaction.