surprise Fun with Lindsay

I have written in past about when Wife's sister Sheri lived with us while attending the " U". Her Daughter Lindsay is now 28, newly married last fall. She's been running since high school and runs in local marathons..so as you may guess she's rail thin, stands 5'1" and I'd be surprised if she weighed an ounce over 100 lb. They live in IL and her husband has a job that takes him away for weeks at a time. She works for an ag company with headquarters here in the city.

She had a 5 day conference here and we are only 15 Min away from the conference center where it's being held so my wife told her why didn't she stay with us ..home cooked dinners and she could save on her travel budget.  So she agreed.  Of course that meant I had to give up my bed and sleep with wife so no masturbation .. on the 3rd day, wife and two of her girlfriends were going quilt shopping ( hitting 3 quilt shops so would be gone all afternoon).   I think WOW NOW I CAN GET OFF!! So I was on bed naked with my tablet watching porn and trying to edge to make it last ..anyway I didn't hear Lindsay drive up. First time I I knew she had come home early was when I heard her walking down hall.

I jumped up to close the door ( don't know why I didn't just go under the covers but wasn't thinking right then). Anyway, I get to door and we meet Face to face.  I try fo cover myself with hand (false modesty for her benefit ), I stammer an apology.  She said it's ok, my mom said I'd probably see uncle Scott Naked so I was expecting it.. She then noticed the precum running down my thigh ..and said well looks like I interrupted something. I'll go change and go for a run... started to turn ..then said unless you want company ..said she was damn horny because her husband left for Ore the week before she came up here. I said sure if it's OK with you it's ok with me, so she took off her work slacks and got on other side of bed and I laid back down on my side.

She already had her hand in her panties rubbing away.  I started jerking again,  tried to hold off but was just too turned on and came on my belly. She watched, then closed her eyes and really got into it and had a great orgasm. 

After laying there a bit said thank you, I needed that, now I really need that run. She went in her room and I went to shower. Nothing was said next two days before she left.. I never saw her naked ( would have loved to see her tiny tits but maybe another time) but when I close my eyes can still see her hand in her little lace panties.