It was very large!
I will try to be brief, but not leave out the details.
It started about 6 years ago. My mom got married after my dad passed away. While we both missed my dad, mom did very well in re-marrying a very handsome and physically fit man. He took very good care of us as a family and is very good to us.
Well I am 20 years old now and not the little girl I used to be.
To my story, a few months ago we had relatives over for the summer and we had to make room for them, so I offered to give up my room and sleep on the couch, no problem. One night while on the couch I was just relaxing, when an urge I had by playing with myself before going to sleep as I normally would have done in my room under the covers and all. I thought everyone was asleep (my mistake) as I was coming to a climax, I moaned too loud and to my surprise my step-dad popped around the corner from the kitchen as my head was leaned back and I was rubbing at a full pace. He said, 'Hey you okay?'
I knew he realized what happened, because I saw him blush, I also blushed but had an amazing orgasm-just knowing he was there. That was the first time I even thought about him that way.
Fast-forward one week later, Mom and the little kids with our relatives went to Disneyland for a few days. I had to work and so did my step-dad, so we stayed home. This is where one of the greatest climaxes of my life happened.
I came home from work and threw a pizza in the oven and later Rob came home. Everything was normal, but as we ate pizza and watched a movie I could feel myself getting wet with him sitting three feet away from me.
I went upstairs, showered, and put on a long t-shirt and came back downstairs. He was still sitting there. I had planned to play with myself in front of him for the last week if the opportunity arose and really wanted to see him. I overheard my mom talking one time to her friend and she mentioned how well endowed Rob was. I wanted to find out for myself.
Now mind you I am not trying to sleep with him; I think that is wrong but just some playing with no sex that is okay right?
So I sat on the couch across from him and just started normal conversation, then I said, 'Last week, did you know what I was doing while on the couch?' he replied, 'Yes, but thought I would leave it alone' I asked him, 'Did it turn you on hearing me?' His reply was that he thought about it, but went and had sex with my mom so he wouldn't think abut it.
Being bold, I just blurted out, 'I came so much that night and wondered if you would let me masturbate in front of you?' Then I told him that I wanted him to do the same. He thought and as he was thinking I lifted up my t-shirt and exposed my pussy to him, leaned my head back and started to play with myself. I was so wet. I was watching and he was not playing with himself-just watching me. I looked and saw a bulge in his pants but no movement on his part. Frustrated I played with myself harder and inserted my fingers into my pussy...wow what a orgasm!
After I came I said, 'you can watch that and not need to cum, did you not like that?' He replied, 'Oh I liked it a lot, just trying to control myself' I walked over to him and he grabbed me and put me on his lap facing away from him lifted my shirt and started rubbing me...wow I could feel him under me and I was dripping wet and came again. I turned around and knelt in front of him, I had to see and play with him, he was going to cum also.
I opened his zipper and out popped this amazing hard on, it was huge. I put one hand at the base and stroked it with the other hand; I was going to make him shoot his load I stroked him for about 2 minutes and he had the biggest explosion I had even seen, it hit me in the face and all over my shirt, I licked my lips, cleaned up and now I wait for my mom to go out of town often, we have never went further that just touching each other but oh how I enjoy it.