All characters in this story are of age (meaning over the age of consent). Any similarity to living persons is purely coincidental.
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My wife and I have been married for nearly 40 years. We are quite happy in our life. Sex is good and frequent, relationship is solid, children are grown and moved out. We get along with all our relations, in-laws included. All in all things are fantastic. An unforeseen, unplanned, and random incident threatened to upset this happy apple cart... but luckily didn't.
My wife's name is April. She is a wonderful wife, beautiful, smart, and great mother and grandmother. She is 1 year older than her sister Audry. Personality wise Audry is very different than April. Where April is very traditional in her beliefs. Our sex life is pretty ordinary. Audry is an odd mix of very traditional and anything but traditional and occasionally drinks like a fish. She does things April could never dream of doing. For example, travel. She's been around the world a dozen or so times, been to the remotest places, and has only slowed down as asthma reared it's ugly head. Whereas April is a home body, fit mind you, conservative in most of her views not politically but in her personal life. No wild oats sewn, no piercings, and would never have a tattoo.
The only expression April has of anything resembling a wild side is when it comes to sex. It took me awhile but I learned that April liked sex in odd places. It's in these places I've found her the most aroused and wanting to make love and departing from her "usual" restraint. Normally she's not resistant to sex but prefers the safety of a locked bedroom for "standard" sex once every few weeks. Standard meaning some kissing, a little groping each other, missionary sex, and then clean up and sleep. Only on very rare occurrences does oral sex make it's appearance. She does masterbate but only in conjunction with having intercourse and when she's really aroused and very drunk.
So, in our many years of marriage I can count on 4 fingers the time's she's done anything oral. A few swirls of the tongue around the head is about it. My going down on her has happened a bit more often, maybe 10 times and she never orgasms and complains it's "not clean." Of course I want it more often, I'm a guy, but she doesn't and in the end I love her too much to let that matter.
If you may be thinking that she didn't like it because I don't perform it well. I think I can discount that because other women I've gone down on thoroughly enjoyed it
and even complimented me. In fact, a little blonde MILF I hooked up a few times said she loved the fact that as she was orgasming and trying to crawl up the bed away from my tongue, I followed her and drover her into the "deepest orgasm ever." Enough said on that.
But I am a dirty old man. That becomes relevant to this story soon.
To expand on April's like of getting frisky in other places. When we were dating she nearly raped me as we drove home from a visit to my brother's home (she actually pulled out my cock and teased the head with her tongue until I finally pulled over onto a dirt road, where fucking ensued), at about 1 am she yanked my shorts down and fucked me on Coronado Beach, once while driving home at 70 mph on the freeway she pulled out my cock and stroked it before pulling off her pants and panties and climbing onto my lap to fuck me as I drove north on I-15, and then in our swimming pool after the sun had gone down and it was dark and quiet. I hope you get the idea.
As for Audry, the only thing I'd learned from April is that Audry liked men and women, didn't have a current partner, but beyond that I had no idea what her intimate likes or dislikes were. We've never been that close and April hasn't ever shared any secrets, if Audry told her. I always imagined her as active because she has that "willing to fuck" vibe about her.
Physically, April and Audry are very much alike. Usually siblings are quite a bit alike at least in facial features but for April and Audry it's uncanny. They are the same height, weight, shoe size, swap clothes regularly, from what I can tell April is only the slightest bit larger in breasts and hips. Audry has dyed her hair from time to time but her natural color is a dark brown. April's hair is a shade lighter and they both wear it the same way. Both of them will only wear one piece bathing suits but even on those they are lovely to look at. There are even times at family get together's that others have talked to one thinking they were talking to the other. Being married for such a long time I can almost always tell them apart.
We live on the coast in Northern California and as a safety feature against earthquakes we have a fifth wheel trailer which doubles as a guest house.
Over the years (this is where the dirty old man comes in) we've had loads of guests stay in that fifth wheel. Even though we had a 3 bedroom house the separation with guests was usually appreciated. It grants a bit of "privacy" staying in the house wouldn't afford. Old, young, relatives, friends, etc... all have stayed and been quite happy. It's quite comfortable. Most importantly to me the shower is directly open to the bedroom.
Unknown to our guests, there is a hidden HD WIFI camera in the bedroom area and it looks across the bed and directly at the vanity and shower.
Over the years I've caught images of guests in all stages of dress, undress, and showering. Hours and hours of it. There have been a number that I've deleted immediately on reviewing the footage. Let's just say it captured footage of people young enough to get one into trouble way beyond just having a hidden camera.
I've caught Audry naked many times times and spotted those tatoos she's mentioned. Most are small and all are hidden by clothing. The largest is one on her lower back across her hips. It's an series of celtic knots. She's fun to watch because she has a nice voice and sings as she going about her routine, usually completely naked. One particularly nice recording has her crawling around on her hands and knees on the bed as she makes it. I've frozen the picture in places as she's moving about, legs spread, pussy plainly visible, ass facing the camera, and done a little post processing to get a very nice look at her pussy.
No, I have never, and will never, share those pictures.
But I digress...
This year one of her visits was to be over Halloween. Our small town has a yearly Halloween party. Each year it's in a different person's home. It's loads of fun with lots of alcohol, food, and more alcohol. No one is allowed to attend unless they are fully costumed to include a mask. Not those funny masks on a stick but proper "hide your face completely" masks.
Last year after the party we decided to fuck with our costumes on. April's pussy was drenched and she fucked me like mad. It was the only time she'd ever orgasmed more than a little one and more than once. Afterwards we were laying talking and I said something like, "If after the party is this good we should do that AT the party."
April grabbed my arm, "OMG, we have to!!" She was immediately on to it because this year's party was to be at our house.
April had talked up the party for years and finally Audry was going to be visiting at the same time.
The theme for this years party was Alice In Wonderland.
A store in Redding always ordered the costumes and April did some internal modifications in order for us to be able to execute her plan.
Alice decided I'd be the Cheshire Cat from Alice in Wonderland. Yup, that's right I got to go as a huge pink and white striped Cat. No, the giant smile didn't make things any better.
Alice and Audry on the other hand would look positively normal as twin Alices. Their costume was a blue dress with white apron, white thigh highs stockings, black shoes, and a porcelain face mask. We tried on the costumes the day before and I'll pick it up from there.
I neglected to mention all men were to be either the Cheshire Cat or The Caterpillar. All women were to be Alice.
