My mother-in-law moved in with us for a few months when her new house was being built. She was already aware that my wife pegged me because she walked in on us one time. However, the things she learned and saw while she lived with us have changed our dynamic.

First, we had a room in our house where we had kinky sex. It was also our spare bedroom. We had sheets for fun and sheets for guests. It was on a different floor than our kid’s rooms and had a door that led outside for when we had special guests come.

My wife told me to go clean the room out for her mom like I would when we had regualar guests. The thing I missed, though, was a large black strap-on and butt plug under the couch in the room. Which she would eventually find, and I will go into detail on that.

My mother-in-law is super hot. People actually have thought my wife, who is also hot and her mom are sisters. That being said, my mother-in-law does have a small mom tummy/mom butt. However, that’s expected in your early 60s.

My wife usually has me locked in chastity. I asked before my mother-in-law moved in to get unlocked, but my wife said no because she knows I think her mom is hot. She doesn’t need me jerking off in her mom’s panties. She would rather take the risk that I’d be caught in chastity over being caught in her mom’s panties by my mother-in-law. I asked if I was still required to wear my wife’s dirty panties and was told yes, that was not changing either.

My mother-in-law moves in, and my wife and her go out for a girl’s night the second night. After they left and the kids were sleeping, I was curious, so I went and checked out what my mother-in-law brought. First, I dug through the hamper and found granny panties she wore for moving. They were full briefs, light pink Hanes her way with a ruffle/lace waistband. As I pulled them out, I realized they were extra dirty with pussy juices, sweat, and skid marks.

I brought them up and smelled them. They smelled so good I had to taste them. I brought the gusset to my mouth and licked the crotch area and skid marks. My little dick was leaking in its cage. Then I tried them on, and they felt so good I was worried about getting caught somehow, so I finger my ass a little in them while wearing with panties pulled to the side and then took them off and put them back.

I often work from home, so in the middle of the next week, when my wife left for work, and my mother-in-law left for the consulting job she had. I again had access to her panties. This time, I found four dirty pairs. A yellow lace VS thong that was crusty with juices, white Hanes ‘Her Way’ granny panties with skid marks, blue and pink flower satin panties that smelled great, and orange and pink lace cheeky panties that had pussy juices still wet in them. I couldn’t help it; I licked the gusset, crust, skid marks, and sweet cum from all of them. My caged dick was leaking as I slid the yellow thong on.

I then shoved a pair of panties in my mouth while I fingered my ass leaking in them. After that, I was horny. I grabbed my wife’s BBC dildo, lubed it, and started riding it. I felt like I was going to explode as I sissygasmed in her panties. Then I took them off and knew I couldn’t put them back in the bathroom hamper, so I washed all the dirty clothes.

That night at dinner, my mother-in-law said, “Thanks to me for washing my dirty clothes in the hamper, but it was not necessary.”

I said, “If I am washing some clothes, I might as well wash all. Then we all have clean clothes to wear.”

Mother-in-law said, “Well, thanks, I appreciate it just didn’t want you having to touch my dirty panties and such.”

My wife gave me a look and said, “Oh, I am sure he enjoyed washing your clothes. He is just such a helper and hates dirty things,” as she glared at me.

After dinner, my wife cornered me and said spill it. “Why did you wash mom’s panties?” she asked.

I said, “I am a helper.”

My wife said, “Yeah, I don’t buy it. You did something in them, didn’t you?”

I said, “Nope, just helping my mother-in-law.”

The next morning was Thursday. My mother-in-law only does consulting for work, so she was not leaving the house that day. However, she went to the gym and, when she came home, showered. I knew her panties would be fresh and ripe.

I told her, “I am going to do laundry if you bring your towel and clothes up, I can wash it all.”

She said OK and did.

I knew the panties were fresh when I went into the laundry and overflow food storage room. There on top lay purple leggings with purple Hanes ‘Her Way’ granny panties inside and were sweaty, dirty, pussy juices and a single skid mark inside. I brought them to my nose, and just as I was getting ready to lick them when my mother-in-law walked in.

She said, “Oh my gosh, what are you doing?” as my tongue was licking her dirty panties.

I dropped the panties and was like a deer caught in the headlights. I tried to say I thought they were my wife’s, and my mother-in-law said, “Nice try, you knew I just brought them up.” She said, “Well, now I know why you probably washed them the other day, but these are extra smelly and sweaty. Well, go ahead, lick them. I wanna watch it.”

I said, “Ummmmm,” as I tried to walk out.

She said, “Lick them, or I tell your wife what I saw.”

So I licked my mother-in-law’s dirty panties in front of her. I had sweats and my wife’s dirty panties on while doing it.

Mother-in-law said, “They must not be good. There’s no twitch in your joggers.”

I said, “They are good,” and just as I did, a wet spot formed on my joggers.

My mother-in-law said, “Oh my God, that’s hot for an old lady like me. If you want my dirty panties, once they come off, they are yours. Just promise to clean them with your mouth.”

I said, “OK, I promise.”

She said, “I will leave them in the hamper for you. You know, as us girls get older, sometimes we pee or shart, not on purpose, from laughing or coughing. So they’ll be pretty dirty.”

I laughed and said, “Like mother like daughter.”

That next week was great every day. I had panties of my mother-in-law’s to lick. As the month went on, I realized she started to change things, and the panties were getting dirtier. All panties were now Hanes Her Way. No VS except on weekends when she went out with the girls. They were VS, but those were creamy and cummy inside. I also dug through her room one day and found a vibrator and Hitachee wand she owned. I enjoyed licking those.

So the following Monday after a weekend, I was getting panties from the hamper, and my mother-in-law said, “Have you really cleaned all of them?”

I said, “Yes.”

She said, “Even if they had pee or a shart on them?”

“Yes.”

“What about the creamy ones?”

“Yes.”

She said, “Oh my God, I thought you would stop with them being granny and pee or shart.”

I said, “I liked those.”

“The creamy ones are from me being fucked on the nights I go out.”

“Your cum?” I asked.

She said, “Well, I am old and can’t get pregnant, so mine and creampies. You licked men’s jizz from my panties.”

I said, “Oh my God, you are nasty.”

“Me? You’re the one that did it, and you wanted to. I bet you have a little boner now.”

As she walked past me, her hand grazed my groin. She felt the metal and looked at me funny. Now I knew she was doing things on purpose. It made me more horny. I decided when she left that week that I was going to wear her panties and ride the dildo, I found.

Wednesday came, and she left the house. I took her dirty granny panties out before I licked them and snuck into her room and found her dildo. It looked used and unwashed as I smelled it. I knew she stuck it in her ass, so I licked it some and then stuck it in my ass. I was so horny I decided to pull the panties aside in the front and back and lay where my dick was right over my face. I started fucking my ass in her room with pre-cum dripping in my mouth, and then as I was climaxing, I opened my mouth and came all over my mouth and face. Just then, my mother-in-law walked in.

She said, “Oh my God, what the fuck are you doing? That’s my dildo,” and then saw my face and started laughing as she looked at my face and realized I also was in chastity. “Is your dick in a locked cage? Why?”

I said, “Your daughter locks me because my penis is so small.”

My mother-in-law laughed and said, “OK, and you just fucked your ass with my dildo and came on your face. You came in that cage?”

Not thinking, I said, “Well, I was trying to cum in my mouth and, yes, in the cage.”

She said, “Oh my God, are you always in that cage?”

I said yes as I tried to grab a pair of joggers.

She said, “No need to get clothes. I saw it all. So, just how small is it? Your penis, that is.”

“When I’m hard, it’s four inches long and like three around.”

She said, “Wow… You really are tiny. How does my daughter enjoy that?”

I said, Please, don’t tell her about this…”

“OK.”

“But we use dildos for her, or she pegs me.

My mother-in-law giggled. “Oh my, you’re my daughter’s bitch then.”

“Yes,” I said.

That night, she asked my wife about the cage. My wife asked how she knew, and my mother-in-law said she walked in on me in her panties, using her dildo and cumming in my mouth. My wife told her my dick was tiny, and I never gave her an orgasm with my tiny four-inch dicklette. That I made her cum by licking her or fucking her with my fingers or a dildo.

“His tiny dick is useless in the marriage except for when I wanted a baby, so it might as well be locked away. That’s also why I also make him wear panties now because men wear boxers, but beta husbands wear panties,” my wife declared. Then she added, “When he wants to cum, I usually peg him, which you walked in on once, and he cums from getting ass fucked. He only gets sissygasms.”

My mother-in-law said, “Well, that’s a shame. That is why I enjoy being single and having male suitors with big cocks. Speaking of your babydick husband, he also licked men’s cum from my panties.”

My wife looked at me, pissed, and said, “I am going to share more with you, Mom, but not when he is here.”

My wife was pissed, and I was punished, but wow, for the next three months, I sucked on a lot of dirty panties.

 

The End.

 

*This story has been edited by AI to fix spelling, punctuation, formatting errors, & basic grammar, but the narrative and plot have remained the same. Even with the limited editing done here, it doesn’t mean any possible major flaws in this story were fixed (That’s the author’s job). The opinions/views expressed in this story (and in any comments) are those of the author and do not represent this site. We support freedom of speech. This story has been previously published on other free sites and is now public domain, which is why we can publish it here.