Things were getting out of hand. We had only been at the beach house for two days and, in addition to my sister Kathy, I had fucked my mom and my cousin Lisa. Kathy had been fooling around as well. Lisa and I watched her fuck our cousin Mark in the storage shed. It bothered me, not because she was fooling around with someone else, but because Mark was an asshole. After dinner I cornered her on the porch.
"Kathy, I saw you fucking Mark. I mean, you're certainly free to have sex with anyone you want, but Mark? He's a jerk."
Kathy put her hands over her face.
"I'm so sorry. He didn't give me a choice. He followed us last night and saw us having sex. He threatened to tell Mom and Dad unless I cooperated."
Kathy sat down on the love seat and cried. I didn't have a lot of sympathy. Mark may have blackmailed her, but from what I saw she loved it. I lost count of the number of orgasms she had. I wasn't going to mention it though. I didn't have any moral high ground. I sat down and put my arm around her. She pressed her face into my chest.
"It's okay Kathy. I'm not mad at you, but I am pissed at Mark. We'll find a way to get back at him."
Kathy smiled at me. We kissed. She slid her hand into my lap and rubbed me through my shorts. Soon she had her fingers wrapped around my hard cock. She leaned over and took me into her mouth. I thought we were alone. A voice startled us.
"Oh, there you two are. I was wondering where you went."
It was Dad. Kathy quickly sat up, wiping her lips. I yanked my shirt down to cover my exposed cock. I didn't know how much he had seen. It was dark so maybe we were okay. Dad walked over to where we were sitting.
"I'm sorry if I startled you. Were you sleeping, Kathy? Is that why you had your head in your brother's lap?"
"Um, yeah, I kind of dozed off," Kathy said.
"I can understand that, honey. It's so peaceful out here, and the sound of the waves crashing would make anyone drowsy. Mike, your mom is looking for you. You better get inside. You know how she can be. Kathy, why don't you join me for a walk on the beach. That should wake you up."
Crisis averted. I went inside while they headed down to the beach. I ran into Mom who was wearing a bathrobe. She asked me to help her with something in the bedroom. As soon as the door was closed, she let the robe slide off her shoulders onto the floor. She was naked underneath.
"Time for your next lesson, honey. We'll begin with pussy eating."
She climbed on the bed and got on her hands and knees. I stared at the swollen pussy hanging between her thighs like a ripe peach. Just above it, the tight knot of her asshole peeked out at me.
"What are you waiting for, honey? Lick Mommy's pussy."
I dropped to my knees and buried my face between her cheeks. The pungent smell of her pussy was like an aphrodisiac. My tongue shot out and parted her folds. I clamped my mouth over her mound and feasted on her juicy cunt. Mom squirmed against me. I moved my thumb to her clit and rubbed. Juices ran down my chin. I continued to lick her pussy and clit until she went off in my mouth. I gulped it down.
"That was nice, baby. Now I want you to lick Mommy's asshole. Fuck me with your fingers while you're doing it."
My tongue moved from her pussy to the tight knot of her sphincter, bathing it in spit. I buried two fingers up her cunt. A few minutes later, Mom went off for the second time. She rolled onto her back, pulling her knees to her shoulders and ordered me to suck her pussy and shove a finger up her asshole. I did. Another climax had me drinking more cunt juice.
"Take off your clothes, honey, and get on the bed. Mommy's got a special treat for you."
I stripped and got on my back. Mom squatted over my face and lowered her pussy to my mouth. She fell forward and sucked my cock between her lips. Her mouth flew up and down my length. My tongue slurped the juices from her cunt. We rolled over until I was on top. I rammed my cock into her mouth and down her throat. She loved it. I continued to finger her pussy and lick her clit to another climax. She was insatiable.
"That's called sixty-nine, honey, but you probably already knew that. Our next lesson is face fucking. You're going to punish Mommy's mouth with your cock. Don't hold back, sweetie. You need to do it hard and make Mommy choke."
She got on her back and bent her head over the edge of the bed. I had seen Dave face fuck Sarah this way. I rammed my cock into her mouth and shoved it down her throat. I pulled out and rammed it down her throat again and again. Mom gagged and choked, but I didn't let up. Spit poured from her lips and down her face, smearing her makeup and soaking into her hair.
"You're a fast learner, honey. Let's do it this way, only this time I want it harder."
Mom rolled onto her stomach. I lifted her head by the hair and slammed my cock between her lips, punishing her mouth and throat as hard as I could. I pulled out when I saw tears running down her cheeks. Mom ordered me to slap my cock across her face and shove it back in her mouth and down her throat. I did. Strands of spit fell from her chin onto the floor. She finally pulled away and sat up on the bed.
"Very good, sweetie. I want you to finish this time and cum all over Mommy's face and tits."
She slid to the floor and knelt in front of me. I grabbed her head and fucked her mouth hard. Looking down at Mom choking on my cock and loving it pushed me over the top. I pulled out. Spurt after spurt of hot cum drenched her face and tits until it was dripping from her chin and streaming down her body.
"You get an 'A' sweetheart. Now we're going to fuck. Mommy will show you some new positions."
We climbed on the bed. I never realized how many different ways there were to fuck. We kept switching from one to the next. Sometimes I thought our bodies would never untangle and that I would be stuck inside Mom's pussy until someone pried us apart. It wasn't just the positions either. Mom liked it rough. She had me slap her tits really hard, spank her ass and choke her until tears came to her eyes. The more pain I inflicted, the more powerful her climaxes.
"You're such a natural, honey," she said, rolling onto her stomach. "We have one more thing to cover in this lesson. You're going to fuck Mommy's ass. Pick up that tube on the bedside stand and I'll tell you what to do."
Anal sex was something I had thought about a lot since watching Dave do it to Sarah. I grabbed the tube and followed Mom's instructions. First, I lubed her asshole and stretched it open with my fingers. Then I lubed my cock. I looked down at Mom's two shapely cheeks, and felt my heart beat faster contemplating what I was about to do. She reached back and spread them wide, exposing her tight brown sphincter.
"Climb on Mommy's back, honey, and press against me right here," she said, slipping a finger into her asshole. "You need to go slow, particularly with someone who has never done this before like your sister. It'll be tight at first, but you'll feel it stretch open as you go deeper."
And just like that, my cock was inside Mom's asshole. She was right. It was tight, much tighter than her pussy. I plowed my way deeper and deeper until I was completely buried between her cheeks. I moved my cock in and out, slowly at first and then faster and faster. Soon I was fucking her ass the same way I fucked her pussy. And, like with fucking, there were a variety of positions. Mom showed me a few of her favorites.
"Cum in Mommy's asshole, baby."
