It was a night I'll never forget. My wife's sister paid us a visit, her blew fortunately and she wanted to spend the night with us. We had a couple of drinks and my wife was ready to go to bed. My sister-in-law, however, wanted to stay up...

so did I. We watched a couple of movies...some interesting. We were watching "Unfaithful" and I started getting really horny when I saw bits of the sex scenes...She knew it...she saw my boner growing from my pants.

The lights were out and I decided to get up and get a blanket. She wanted one as well...We started watching the movie again..and another sex scene showed .

I grew hornier...

I took advantage that the lights were out because I started to masturbate...Sister-In-Law caught me..."You're horny, too?" she asked. "Yeah, " I replied. "We can help each other out..." she said...wow...

I knew what she wanted. She sat next to me stroking my thingy at first. She moved slightly down kissing my chest and then...

sucking my thingy. I couldn't hold myself back anymore...

I started rubbing her nice tits and squeezing her tight soft place. As she took off her panties, my sex level jumped way high. I helped her undress quickly..then, I put my huge thingy in her hot-wet softness...

she moaned so loud...I thought that my wife would wake. I started playing her slowly at first, then..we just played faster and faster.

She moaned and started to scream...I hope we get to do that again.