For a long time I didn't know how to feel about my feelings for my sister-in-law. She was a gorgeous woman, and it made it hard to accept that I had feelings for her since she was married to my brother. One night she was wearing a low cut shirt, and her nice breasts were on display. It was then I realized what exactly my feelings were for, I was crazy horny for her.
It only got worse over time when I did anything I could to try and catch a glimpse at any bare skin. Sometimes she'd bend over and I'd get a nice view down her shirt, and then I'd have to try and and hide my stiffness as best as I could.
One night my sister-in-law decided to take a shower at our house since she'd just returned from the gym and wanted to rinse off. The thought of her in the shower, water running down her sexy body, made my cock desperate for attention. So I went to my room to relieve myself, after a few minutes of pleasuring myself to the thoughts of her an idea popped into my head. The bathroom was right by my room and it had no lock on it...anyone could just walk right in. She'd been in there for a while, so she might be fully clothed or not even in there anymore, but still I figured it was worth a try.
I got up, still completely nude with a pulsing stiff cock covered in lotion. I massaged it as I walked, and I was shaking from nervousness. I reached the bathroom door and could hear her humming to herself. I must have stood there for several minutes before my hand found its way to the nob, then suddenly without even thinking I just simply opened the door. Then I saw her in all her beautiful nude glory, massaging her clit while looking in the mirror. She turned around and looked at me, then looked down. Her eyes widened at the sight of my nakedness, but she did nothing. We just stood there staring at each other's nude bodies and continued massaging ourselves.
After a few minutes I moved in closer to her, and we stood next to eachother. I got brave and decided to caress her breasts and puffy nipples, then I started to suck on her right one and she moaned passionately. Soon after I cummed all over her stomach and thighs, and she grinned at me. She then moved my hand over to her crotch and I started rubbing her slippery hairless pussy. I enjoyed myself quite a bit, right hand masturbating her and left hand caressing her breasts.
She was such a beautiful sight, sitting there on the counter as I finger fucked her pussy. We made out as I went, but it got harder as her moaning got more and more passionate. Suddenly she whispered to me 'Oh God! I'm gonna cum!' Then I felt a hot sticky wetness engulf my finger, and she began kissing me wildly and passionately. When she pulled away finally she smiled at me and thanked me for 'the best orgasm she'd ever had.'
That night led to more than just masturbating, but that's a whole different story...