As I snuck into the bathroom, I kept thinking how incredible Aunt Linda looked in nothing but a strap-on, and couldn't wait to see her fuck my mom with that realistic looking dong of hers. I suddenly realized that I hadn't come all day. It was time to let loose.
I silently opened the door, amazed that no one could hear the thundering of my heart beating a mile-a-minute. I peeked in just as Aunt Linda was opening the shades to let in some light so I'd be able to see them. My mom was lying on her back masturbating, apparently she didn't bother to stop this time when her sister came into the room.
"What have you got there, Sis?" Aunt Linda climbed onto the bed.
"A towel I found in the hamper." My mom lifted it to her own face. "It has my little boy's cum on it." She held it out to her sister, who drew in the scent of my dried semen.
"Mmm, I'll bet it tastes good when it's fresh and warm."
"Oh, it does, Linda, it does." Mom moved the towel down between her legs and rubbed it against herself. "My son's cum tastes so good to me, I want it so bad. I want him to come in my mouth right now."
"Would you share some with your big sister?" Aunt Linda caressed my mother's chest, squeezing and rubbing her big tits.
"Yes," Mom breathed, "I want you to know how good my baby's cum feels in your mouth." She released the towel as her sister's hand reached down there and she slipped a finger inside my mom's pussy. "Aah, that feels so nice. But I want him inside me. I want to feel my boy's hard penis in my pussy again."
"Maybe this will do instead." My aunt brandished her fake cock and my mom took notice of it for the first time.
"Ooo, you came to fuck your little sister with your big cock?" My mom grabbed it and stroked it experimentally. "Where did you get this thing?"
"My daughter got it for me last Christmas. Rachel loves it when her Mommy fucks her tight, little pussy with it."
"I want you to fuck me, Sis. Fuck me just like you fuck your daughter. Fuck me like I want my son to fuck me."
"Then get up on your hands and knees, bitch!" Aunt Linda gave Mom's pussy a hard smack, that brought out an involuntary yelp.
I was peering through the narrow space at the door and going out of my mind. I had planned on waiting until they really got into it before I started jerking, but they were getting wild right out of the gate. I tugged the loose skin of my ball sack in an attempt to distract me from my urge to stroke off immediately.
"Like this?" Mom was up on all fours across the bed sideways, her head facing toward me. I had an excellent view of her huge tits dangling down, but I couldn't quite see exactly what Aunt Linda was doing behind her. Worse yet, I couldn't open the door any wider or Mom would spot me. I tried to calm my breathing and just watch and enjoy whatever I could see.
"Spread your knees, slut. Let me see that hairy pussy of yours." Aunt Linda maneuvered behind my mom as she followed her sister's commands and opened herself up wider. My aunt bent down and spit on my mom's pussy, and used the head of the dildo to spread it around.
"Be gentle, I'm still a virgin," my mom mewed, and wiggled against the head of the fake cock.
"I'm going to give it to you rough as I want. I'm going to fuck your virgin puss so hard you're going to cry, bitch." With that Aunt Linda thrust her hips forward and slammed the dildo into my mom's pussy. Mom barely cut off a scream of pain and delight.
"Please don't hurt me," Mom begged. "I won't tell anyone you put your dirty cock in me, just don't hurt my soft pussy."
"Shut up, slut. This is my pussy, understand? And I'll fuck it any way I want." She pulled back and slammed into her sister again. Mom grunted with pleasure. My aunt then began riding her with a slow, steady rhythm. The movement sent my mom's pendulous breasts swaying forward and back in such a way that my balls tightened with desperate yearning.
"It's too big," Mom whined. "Your cock is too big for my little pussy."
Aunt Linda raised her hand and brought it down hard onto her sister's rear end. Smack!
"Ooo!" Mom squealed. "Please don't spank me, I'll be good." SMACK! Aunt Linda delivered and even harder slap to her other cheek.
"I said shut up, bitch!" My aunt picked up her pace, humping my mom harder and faster. Mom's hanging boobs began to swing and flap together. I was feeling like a caged dog left to starve with a pile of fresh meat just beyond reach. I noticed Aunt Linda looking toward my hiding place. She grabbed onto my mom's hips so she could get more leverage on her thrusts, and blew me a kiss.
The door swung open and before I was consciously aware of what I was doing, I had stepped into the room. My mom's eyes widened when she saw me standing there naked and ready for action.
"No," she moaned, "don't look, sweetie. I don't want you to see me like this." Even as she spoke, my mom continued to match the thrusts of her sister's dildo.
"It's okay, Mom," I said as I moved closer. "I know all about what you and Aunt Linda do together."
"I don't want anyone to know that I lick my sister's pussy." She caught one of her wobbling tits and fondled it as she watched my hard cock get closer. "No one knows that I let her put her fingers and her tongue in my cunny."
"I know, Mom. One day I'll know all your dirty secrets. If you let me." I took one more step and was finally close enough for Mom to take me into her mouth. She did so with manic urgency.
The deluge of sensations assailing my brain was overwhelming. My mom's mouth closed around my cock like a velvet vice. She sucked me hard as the natural motion of her sister fucking her from behind propelled her down and back on my aching shaft. Added to that was the visual feast of my aunt humping my mother, her bare tits bouncing in time to her plunging thrusts. I reached around either side of my mother's torso and took hold of her dangling breasts and that was all it took to put me over.
I convulsed and cried out as I unleashed my first orgasm of the night almost immediately into my mom's mouth.
"That's it, boy, fill that slut's mouth with your cum." Aunt Linda administered another slap to her sister's ass. "Make her eat your filthy spew."
I withdrew from Mom's mouth, my head abuzz, and she pulled me down. I sunk to my knees in front of her and she kissed me. He tongue wiggled between my lips and parted them. I relaxed my jaw and opened up, only to feel something land on my tongue. Mom hadn't swallowed my load, but held it and had just passed it back to me.
"Don't swallow," she whispered huskily, all the while getting pounded from the back. She motioned to her sister with a toss of her head, then rolled onto her back.
I moved around the foot of the bed to where Aunt Linda was adjusting her position between my mom's legs and reentering her with the strap-on. My aunt hungrily accepted my kiss, and opened her mouth to receive the gift of my spent semen passed to me from my mom. The flavor of my own cum was still thick in my mouth as I watched Aunt Linda lean down and kiss my mother.
Once again, my load passed from one mouth to another. But my aunt held some back. She lifted away and let my white fluid drool from between her lips down to my mother's open, waiting mouth. Mom caught every drop of my cum as it streamed down to her and swallowed it gratefully. The sisters followed that exchange with a passionate kiss, exploring each other's mouths with voracious tongues.
I was like a kid in the world's biggest toy store who's been told he could have anything he wanted. I wanted everything, and I had no idea what to do next. I decided to first get some more light on the situation and opened the blinds of the other window in the room. I watched my aunt fucking my mom across the bed in the missionary position for a few seconds and decided to go around behind them.
Aunt Linda's big round ass rose and fell, flexing on each down stroke. The straps of her dildo harness were cinched tight around her waist and along the sides of her buttocks. They all came together at her crotch, but there was a gap through which her chubby outer lips were squeezed. I chose this as my next plaything.
I spit on my fingers and worked first one, then a second, into my aunt's pussy. As she fucked her sister, I rapidly pumped my fingers in and out of her hole. This was so much better than the playful poke I had given her this afternoon.
"Oh, yes, that's it, boy," Aunt Linda growled. "Bang my pussy while I fuck this slut!"
"You fuck me so good," my mom panted, wrapping her legs around her sister. Their tits rubbed together in a chaotic frenzy of nipples and quavering flesh. "Make me come on your cock. Make your little sister come on your big cock."
"Oh, God!" Aunt Linda cried and plowed into my mom even faster. "Your son has his fingers in my cunt. My sweet little nephew is fucking me with his fingers!"
The two women thrust and heaved against one another as their words gave way to inarticulate cries of animal pleasure. I forced a third finger into my aunt's contracting pussy hole and pounded her as hard as I dared. My mom pulled her sister deep inside her with her encircling legs, and let out a series of guttural barks as she was the first to come.
Aunt Linda pushed down hard, squeezing her ass tight as I fucked her from behind with my hand. She gave a long plaintive groan that became a howl of ecstasy as her orgasm released itself and rampaged through her body. Even as the tensing muscles of her pussy nearly crushed my fingers, I didn't slow my pace until she reached back and held my wrist still.
My aunt rolled off of my mom, and they lay side-by-side, as they caught their breath. They were each covered in sweat, and left their legs open to me. I eyed their cunts intently, one covered in hair, the other shaved and puckered between leather straps. I decided I was ready to take my turn fucking my mother with my very real cock. Before I could make my move, Mom spoke up.
"Do you like your auntie's big penis?"
"I liked seeing it go in and out of your pussy, Mom."
"Do you want to suck on it?"
