Let FIL into my pants

When I was 18, married to an Army PFC who was stationed in Asia for 12 mos - I was just too used to frequent sex with him. We made love all the time - everywhere, and we tried everything with each other's young bodies!
I was staying at my in-laws for the last 4 months of my husband's deployment.....so it had been 8 months since I'd been with my young husband or had sex with a man....my hairbrush handle - yes!, my pillow - yes!...fingers - yes!....but not a man's you-know!
I admit that at 18 I didn't always dress appropriately around my FIL or my husband's 15 yr old brother. My bikini was pretty skimpy - I went to bed in my husband's T's and bikini panties, maybe didn't always ensure my bedroom door was closed (I kicked the sheets off frequently after playing with myself) - lot of leg and some panty, crotch and butt shots too often for my MIL! She kept asking me to be a little more careful in what I was exposing of myself. I am small breasted - so really didn't feel the need to wear a bra "around family" ....that caused some problems too, apparently. My shorts were too tight and too short - but they were only kind I owned! I wore them for my sexy young husband....he loved me in them!
Anyway - I guess it was bound to happen.
My MIL went off to visit her mother and sister in upstate - and I was there with pops and little bro.
I admit - I got a little flirty with the males in the house! Coming down in just my shorter tops which just did not fully cover my flowered bikini panties....breasts moving easily about when I walked or bent - pointy bits on each clearly visible way too often to be an accident!
Some days I got so flirty that I'd have to relieve myself that night with the hairbrush! remembering things!
I knew the boys were watching me ....enjoying me.
One night it happened. I just got soooo H-word that I got out of bed and went past my FIL's bedroom door. I did this twice - then I heard him speak to me in the dark, "Honey - is there something the matter?"
I stopped in the doorway - and I knew he could see a lot of my 18 yr old body - since I was wearing just my bikini panties and a way-too short nighty. Back-lit by the kitchen lights I struck the sexiest pose I knew how.....and told him that yes there was something the matter!
"What, honey?"
I hesitated the longest time - then pushed myself over the edge, "I miss my husband."
"I know, honey - just hang in there a few more months."
"No, I mean I miss a m a n!"
"Oh....! Umm, what ah....?"
"Can I get in bed with you Dad?"
"Oh, honey....umm. Are you sure?"
"Yes! - I need to be with a man." and I got a little weepy.
"Honey, I know it's hard on a young woman. I do - I can imagine some of what you are going through. The loneliness."
"Dad, it is more than that....."
"Can you tell me honey?"
"Dad.....I need a man between my legs!"
"Oh, wow honey - you poor thing! It's like that huh?"
"YES Dad!"
I said this as I walked to his bed. He looked me over slowly from crotch to my eyes, and then he lifted the covers.... and I crawled in.
We cuddled for a long time - then I slipped my leg over his thigh.....and accidentally bumped his very stiff organ! Then he pulled me atop him and we kissed so passionately I thought I would c o m e! I might have! His hands were all over me....I slid down my panties to give him all the encouragement he needed. He didn't need any - it turned out! I thought he was going to tear off my poor butt cheeks - he went at them so hard with his big hands. I F'ing loved it! He flipped me over and started sucking at my feet and went all the way up to gently biting my neck - with lots of fun stops along his way! Spent a lot of time at my little bottom! Never been bitten on my ass before!....but I have had a tongue in there.
Finally.....OK.
He was larger than his son - and he didn't last long the first time he entered me - "You've teased me too much since Barbara left, young lady!" he said by way of explaining his quick eruption in me.
But he did very well the next two times! I needed a lot of touching and kissing that night! I was embarrassingly insatiable! He didn't seem to mind! He kept telling me how wonderful my teen tight pussy felt to him - and how he loved my mouthful teats and hard little tips in his mouth and hands!
He was a very good lover - and I did my very best to keep up with him and thoroughly thank him for attending to my needs!
He loved the taste of me! Everywhere, including licking my butt hole!
Was I embarrassed the next morning as his 15 yr old joined us at breakfast? Hell yes! I sure was. I was so sure I'd screwed things up. But he took me aside and gave me a fatherly hug - and told me not to worry , that I was still his sweet DIL, and that he loved me as such. And then he took my shoulders and looked me straight in the eyes and told me "thankyou for an amazing amazing fuck, young lady you are one sweet cunt !!" and kissed me on my forehead, while sliding his hand into my panties and giving my bare ass one hell of a not-at-all fatherly squeeze! He didn't seem to want to let go of it.....! Finally I had to pull away because his son was coming down the hall!
I sat carefully for breakfast - because I was very pleasantly, and mighty, sore after hours of his attention. But at 18 - I recovered quickly!
Funny - he never asked if he should pull out.
He never did each time.
I was on the pill - but he didn't know that.
Naughty pops!