Two Horny

This should be the final part of this story, so I hope you all enjoy it.

* * *

As I expected, the Mercers' pool was filthy. The bottom was covered in leaves that had probably been there since autumn, and they had choked up the genie and the skimmer box. It was quite warm, and of course there was no shade near the pool area, so it wasn't long before I was hot and sweaty.

While I scooped the leaves out of the pool and into the bin, I quietly fumed. My annoyance with mum hadn't abated, and I only kept cleaning for two reasons. The first was because if I didn't, I would look petty in front of Mrs Mercer, and I didn't want that. She was actually really nice to me and when she'd answered the door I couldn't help but notice she was upset. I knew it wasn't about the pool, but I didn't want to do anything to make her any more upset.

The second was that, with the pool cleaned, we'd hopefully be coming over a bit more. I always looked forwards to summer, because it meant pool parties at the Mercers', which in turn meant seeing a lot of attractive women in tight bathers. In the past I admit I used to enjoy looking at my sister Jess more than the others, but it was always nice seeing Mrs Mercer and Amy. Mrs Mercer in particular actually had an amazing body, shorter than my mum and sister but so much curvier, with huge boobs.

I paused in my work, scowling, and adjusted myself in my shorts. While I had gotten erections over Mrs Mercer and Amy before ― the first time I'd jerked off had actually been after seeing Mrs Mercer dry herself off ― getting one over my mum and sister was fairly new.

This was Jess's fault. While I'd always thought she was hot, to the point of occasionally thinking about her as I jerked off, I'd never thought of my mum in that way. But after Jess had jumped me and we'd had sex, and then I'd seen dad looking at her ass, I seemed to have sex stuck on my mind. Mum pretty much looked like an older version of Jess, but slightly larger with greater curves and blonde hair.

And I was partial to blonde hair.

I was still thinking about it when mum came out and told me she was leaving. I was surprised: she never left the Mercers' early, and considering how upset Mrs Mercer looked I figured we'd be here for a good four or more hours. But here she was, saying a cursory goodbye and telling me that Mrs Mercer would drop me home when I was done, and then she was gone.

A little while after mum left Mrs Mercer appeared, walking up to me with a cold glass. She had gotten dressed, and was wearing a red shirt that was partly undone, exposing a large amount of creamy cleavage. I immediately stiffened in my shorts, but Mrs Mercer was so close that there was little I could do about it without making it more obvious.

"Lemonade," she said, offering me the glass. I smiled gratefully and took it.

"Thank you Mrs Mercer," I said, and took a sip. It was deliciously cold. "It is quite hot out here."

"You don't say," Mrs Mercer said, her eyes flicking down to my crotch. I felt my face go red, but she didn't say anything. "And please, call me Alice."

"Okay, Alice."

Mrs Mercer ― Alice ― walked past me, and looked down into the pool. As she did I couldn't help but notice the roundness of her ass, and I felt the sudden urge to reach out and grab her. She turned to me and smiled, and I looked up guilty, expecting her to be annoyed to find her best friend's son gawping at her behind, but she simply said: "It looks good. Do you have much more to do?"

I shook my head. "I'm almost finished scooping all the leaves out of the pool, and after that I'll clean out the filter. That should only take another twenty minutes or so. Your pool was pretty clean; it was just filled with leaves."

"That's good," Alice said. She paused for a second and smiled at me. "I'll leave it to you then. Just let me know if you need anything, okay."

She walked off and I watched her go, wondering.

* * *

The filter was dirtier than I expected, and it took a good twenty minutes with the hose to clear out all the gunk collected between the various meshes. When I was done I put the filter cartridge back in its housing, screwed all the valves shut, and turned it on to make sure it all worked smoothly and there was no air in the pipes. Alice came back out as I was turning the system back off.

"Are you all done?" she asked.

"Yes, it's all finished."

"Thank you so much," Alice said, and wrapped her arms around me in a tight hug. Her warm body pressed against mine, and the feel of her full boobs pressed against me caused the inevitable. I tried to shimmy away, but she didn't loosen her grip, and so my half-erect dick pressed against her.

As I pressed against her, I heard Alice exhale quietly near my ear. She pulled back slightly and looked at me ― then suddenly her lips were pressed against mine, her tongue was forcing its way into my mouth and I staggered backwards as she pushed herself against me. She forced me against the pool fence, her hands roving over my body. I cupped her ass in my hands, squeezing, and she moaned into my mouth. She started grinding against me, and then I felt one her hands slide into my shorts.

"Mrs Mercer," I gasped, and she suddenly stopped, one hand still in my shorts, and looked at me.

"This isn't right," she murmured, and stepped back, suddenly looking panicked. "This would have been a mistake, okay," she said suddenly. Her boobs heaved as she breathed, and my dick, which she had pulled out of my shorts, jerked reflexively. She licked her lips briefly then shook her head and stepped back again.

"Mrs Mercer," I tried, but she cut me off.

"You are my friend's son, and this never happened, okay," she said firmly. I opened my mouth but she shushed me again. "I think I should take you home now. Thank you for cleaning the pool though, Andrew."

I tucked myself back into my shorts and followed Alice to her car in tense silence. She back to my house without a word, and pulled up on the verge outside rather than turning into the driveway. I looked at her uncertainly, and she looked back at me sadly.

"See you later, Mrs Mercer," I said as I got out of the car. I paused for a second before closing the door, but she still made no reply and drove off.

I walked up to the house, confused. I wasn't quite sure what had happened with Mrs Mercer, but it was clear that she was having some serious problems. But whatever her deal was, she'd left me with a lot of pent up frustration, and I found myself hoping that mum and dad would be out, leaving Jess and I home alone.

"Hello?" I called as I headed through the kitchen. The house was quiet, but as I went to head up the stairs I passed mum sitting in the living room. She looked up as I walked by, and then I heard her footsteps behind me on the stairs.

"Drew," she called as I reached the top of the stairs. I sighed and turned around.

She was standing a few steps below me, looking up with a strange expression on her face. For a moment we just looked at each other, and I couldn't help but notice the fullness of her boobs.

"I'm going to a shower," I said, tearing my eyes away from her. I walked away, resigned to having to use my hand rather than having sex with Jess again, and stepped into the bathroom. I turned and went to close the door, but to my annoyance mum stepped inside before I could, and closed the door behind her.

"What's going on?" I said suspiciously. She was standing with her back to the door, stopping me from leaving, and the situation felt very weird.

"I'm sorry for making you clean the Mercers' pool," mum began carefully, "but I think I have a way to make it up to you. But first I want to explain why I made you go over there today."

Mum hesitated and I looked at her pointedly. "Why?" I asked, after a few quiet seconds had passed.

"Paul has been having an affair, and so Alice is divorcing him," she said and I felt a moment of shock. They were mum and dad's best and oldest friends, and had been together for my entire life. I liked the Mercers, and the idea that their marriage was over suddenly filled me with concern over my parents. They hadn't been getting on that well lately, and I wondered if this was her attempt to ease me into the idea.

Mum waited a few moments before continuing. As it was, I was barely able to pay attention to what she was saying. "I didn't know for sure until today, but I knew something was wrong, and I thought having you clean the pool might help stop Alice and Paul from fighting so much. It was silly, I know, and wrong of me to make you, but I was worried about her."

"I understand," I said neutrally, and mum smiled at me weakly.

"That's good," she said.

There was another pause, and I waited expectantly for mum to leave, so I could have a shower and maybe relieve some tension. But instead she frowned at me and said: "I also wanted to speak to you about Jess."

I felt a tightening in my chest, and I struggled to subdue my rising panic. "What do you mean?" I asked dryly.

Mum looked at me, and something in her face told me that she knew. "I know you and your sister had sex, Andrew," she said, and I felt a weight land in my stomach.

"I can explain―"

"I know about you and your sister," mum interrupted, "because I know about Jessica and your father. And I am not angry about them either."

When she mentioned Jess and dad I mentally reeled, and I almost missed what she said afterwards. But enough of it penetrated that I glanced at her in confusion, not sure I had heard right. "You're not mad?"

"At first, yes, but not any more," she said. She paused for a second, and then continued quickly. "Which brings me to how I can make up to you for what you did today. I thought that, since you didn't mind sleeping with your sister and she is busy with your father, I could help you out a little bit."

I almost wasn't sure what I was hearing. "You want to have sex with me?"

Mum smiled uncertainly at me. "If you want to, then yes."

There was a tense moment between us, and I suddenly realised mum was uncomfortable, unsure of whether I had rejected her or not. I wasn't sure what to do, and opened my mouth to say so, but instead said: "I've always preferred blondes."

We looked at each other for a second, and then mum stepped close and put her arms around me. She hesitated briefly and then pressed her lips to mine, and for a moment it was weird and I almost pulled away. Then her tongue slipped into my mouth and she pushed her body against me, and suddenly I was hornier than I can ever remember being.

We kissed passionately and it felt as if mum's hands were everywhere, and I cupped her ass in my hands and lifted, pressing her against the door. She grunted and I felt her hands pulling my shirt over my hand. I pulled back to let her, and then tore her shirt off, exposing her boobs in a plain light purple bra. I immediately grabbed them, squeezing them and feeling the warm flesh as she unhooked it, and then I had her left nipple in my mouth.

"Oh, my little boy is so hard," she moaned, her hand fondling me through my shorts. She pulled my head off her boob, her nipple hard and pointy, and began pulling down her shorts. "I need you in me," she said.

I tore off my shorts and pressed against her. She was wet, even wetter than Jess had been, and I felt my dick slip as I tried to push in. Mum giggled nervously and reached down, positioning me and then pushed herself onto me. She was looser than Jess but the difference was slight, and she was so much warmer and there was less resistance. I began thrusting in and out of her slowly, relishing the heat around my dick and even the slight squelching noise as I moved.

"Oh shit," mum said hoarsely. She started humping away at me frantically, grabbing my face and putting her mouth on mine. She panted and moaned into my mouth, and I held her hips tightly as I bucked into her.

I was nearing boiling point when she suddenly stiffened and grunted, clenching around me tightly. Her legs were wrapped around me like a vice, and I she clawed at me feverishly.

"I'm going to come," I grunted as I thrust into her rapidly, struggling to hold it in.

"Come in your mother," she yelped. "Come in your filthy cum-slut mother. Mummy wants you to spurt inside her."

Mum begging me to come in her was the final straw. I grunted and came hard, harder than I had with Jess, harder than I ever had while masturbating. I pumped into her furiously, and when it was over collapsed against her, breathing hard.

For a while neither of us moved, and then mum licked at the corner of my mouth. I looked at her and she kissed me quickly, then again with more force and urgency. Then we were kissing each other madly, and I held one hot, heaving boob in my hand, my semi-hard penis still balls-deep in my mother's dripping pussy. She ground herself against me slowly and sensually, and I felt my dick slowly start to come back to life.

"Enjoy that, did you?" mum breathed in my ear.

"Very," I replied softly. "Although the 'come in your mother' stuff was a bit of a surprise."

Mum stretched, rubbing herself against me, and cooed as my dick twitched inside her appreciatively. "I like my sex to be dirty," she said. "As you will come to realise."

I looked at her and grinned hopefully. "Is having your son fuck you in the ass dirty enough?"

Mum looked at me with wide eyes, and I wondered if I'd gone too far. "Do it now," she said huskily, pulling off my and getting on all fours. "I want you in my ass now."

Hearing those words from my mum caused my dick to make the full return to life. I stood behind her, rubbing my dick in the liquids seeping from her pussy, then gathered a handful and slowly dripped them into her arsehole. She flinched slightly, but then relaxed and the liquid slowly oozed into her.

I'd never done this before but had watched many anal porn videos, so I knew enough to start slow. I began with a single finger, and she quivered as I slowly pushed it into her. I slowly eased it in and out, and then looked over her shoulder at me.

"Just shove it in," she said, panting. I could fresh fluid slowly dripping out of her pussy and was surprised. I had no idea mum was this kinky. "I want my boy to take my arsehole and make it his."

I rubbed my dick against the outside of mum's pussy a final time and then pressed it against her arsehole. She moaned slightly, and then I slowly pushed inside her. It was so tight it was almost painful, and mum's back arched as I forced my dick into her. When I was as deep as I could go I paused, then slowly eased it out, and then back in. After the fourth or so time she was noticeably looser, and I started to enjoy the sensation.

Grabbing mum's hips I started pumping into her faster and faster, until the bathroom echoed with the sounds of my thrusting in and out of her. She grunted, and I could see her rubbing her pussy with one hand as I fucked her arsehole. I pounded faster and faster until it almost hurt, too lost in the feeling to care if mum could handle it or not.

"That's right," mum panted as I thrust desperately. "Fuck your mum in the arsehole. I want you to make this your arsehole, I want you to fill it with your cum."

All too soon I was overwhelmed, and I felt myself blasting spurts of cum into her. It wasn't a lot, but the tightness of her arsehole meant it was quickly filled, and when I pulled out a spurt of cum came with it, dripping off my dick and splattering against her cheeks. Mum panted and slowly rolled over, looking at me with flushed cheeks.

"Was that good?" she said in between breaths, and I nodded tiredly as I helped her to her feet. She stood shakily in front of me, blobs of cum dripping from her pussy and arsehole.

Mum leaned against me tiredly, and I put an arm around her, cupping her boob instinctively. "So," I said carefully, "what do we do now?"

Mum looked up at me. "Well, since we know about Jessica and your father, there's little point hiding this from them. So I think we just have sex whenever we feel like it."

"That sounds good," I said inanely, but I felt slightly annoyed. I doubted mum would want it more than maybe once a week, and while that was more than I was getting before, I had tried sex now and I wanted more. I could probably get with Jess maybe one or two times a week, but I had a feeling she'd always been more focussed on dad than me.

"Yes," mum said lazily. "It will change depending on how we feel, but I think once or twice a day should be good, don't you?"

* * *

I woke up feeling drained but satisfied and stretched, before getting quietly out of bed. As I stood up I looked over to make sure Jess was still asleep, and after making sure she was walked down naked into the kitchen and made myself a bowl of cereal. I was just finished when dad stumbled into the kitchen, wearing only a pair of boxers, and began making coffee.

"Not bothering with clothes, I see," he said and I merely grunted.

Things between dad and I had become slightly different since he'd started fucking Jess and I'd started fucking both mum and Jess. I don't think he particularly liked that his son was having sex with his wife, but since he got to have sex with his gorgeous daughter, he never said anything. The subtle tension remained, however.

"Jess is in her room asleep," I said casually. Dad looked up at. "And you know how horny she gets in the morning."

Before I even finished my sentence, dad was gone. I couldn't help but laugh to myself. It had been nearly three months, but he still couldn't get enough of her. That said, I thought as I opened the door to my mother's bedroom, I was barely any better.

Mum was lying on her side under the sheets, facing away from me. Unlike Jess's room, which smelt of recent sex (as dad would soon discover), mum's smelt fresh and clean. She and dad rarely had sex any more. This was probably because each of them preferred their children, but I wasn't complaining. They still loved each other, they just enjoyed sex more with other people.

I slid under the sheets, pressing against her and rubbing a hand along her side. She moaned appreciatively and stretched, pressing her round ass against me. I rolled on top of her and kissed her deeply, pulling up to find her looking up at me hungrily. She was already slightly wet, but I'd learned that sometimes mum liked it a little rough, and from the look on her face I knew this was one of those times.

"Good morning, mother," I said, and then thrust into her in one swift motion.