So, nearly two years ago now, I was dating Alice, a very pretty blonde haired girl I had known since high school, we started seeing each other in college, but by the time we graduated and were starting our adult lives, I really wanted to see other people.
It wasn't anything Alice had done, I just wanted to sow my wild oats, explore other worlds, you know, screw around a little.
However, her mother, Mrs Moore, found out, and then had sex with me, to persuade me stay with her daughter.
I know I should have just walked away, but Mrs Moore was a tall, skinny, blonde haired, middle aged woman, and very hot, and once she started to do things with me that Alice never did, I just couldn't say no.
That was two years ago, and every time I had doubts, every time I thought maybe, I could finally walk away from Alice, Mrs Moore would change my mind.
Now, Alice and I were married, we had our own place, and I was miserable, but at least it couldn't get any worse, right?!
Well, half way into our first year of marriage, Alice's parents invited us to their holiday home, down on the coast for the week.
As Alice and I had the time off from work anyway, it sounded like a good idea, so, we drove down to the little seaside town, where the holiday home was, and soon arrived at a beautiful, small white stone cottage, overlooking a sandy little beach.
We soon got settled in, and once we had, Alice's parents, or mom and dad as I was now allowed to call them, then suggested we go down to the beach for the afternoon, as it was a lovely sunny day.
So, we made our way down to the little sandy cove, before strolling towards the far end, where there were less people.
Then once we found a nice spot, Alice and her mom laid out some beach towels, before they pulled off their little sarongs, to reveal their little bikinis.
Alice looked pretty nice in her aqua blue outfit, but her mom looked even hotter, in her little white one.
I couldn't help but stare at her fit, skinny pale body, before they both then sat down, and once Alice's father and I joined them, for a while, we just lay there, enjoying the hot bright sunshine on our bodies.
However, as we relaxed, and tanned, Alice couldn't seem to stop looking over at a young family, further along the beach, and watched happily as a young boy and girl, eagerly built sandcastles.
Then, after a moment, she said cheerily to me "Isn't that lovely? Maybe we should start thinking about having a family?"
I instantly sat in stunned silence, I knew this day might come, I knew there was a good possibility, Alice would want kids one day, I had just hoped it wasn't yet!
Anyway, after a moment of awkward silence, Alice then asked again "Well, what do you think?"
I still couldn't bring myself to say anything, I knew what she wanted to hear, and I knew what her mother would want me to say, but right then, I just couldn't say the words.
"I... think, I'm going to go for a swim! Let's go for a swim! The water looks lovely!" I quickly blurted out in reply, before jumping up, and running swiftly towards the big blue waves.
I then ran into the ocean, dived into the water, and eagerly began swimming out to sea, hoping this conversation would be forgotten about, by the time I returned.
However, like a hungry white shark, sighting its prey, as I stopped for a moment, waist deep in the waves, I saw Alice's mother moving towards me, and a cold chill instantly ran down my back.
She firmly marched down the sandy beach, in her little white bikini, before she stepped into the water, and then continued towards me.
I stared back at her in horror, as she then approached me, and a few seconds later, she waded up to me, and then asked angrily "What are you doing? Do you know how childish you looked, running away like that!"
"I'm sorry! I just... didn't know what to say!" I replied unhappily back.
"You didn't know what to say?!" asked Alice's mother back, in disbelief.
"No. I panicked!" I replied back unhappily.
"Fine! Then let me tell you, what you should have said!" she then said firmly, before adding "You should have said 'Yes honey. I think starting a family would be a wonderful thing, and we should start, as soon as we can!'"
"But I'm not ready to be a father. I'm barely coping to be a husband!" I replied unhappily back.
Alice's mother then glared at me, before she moved closer to me, and then, under the water, grabbed hold of my bulge, through my swim shorts.
I instantly groaned in discomfort, as she gave it a little squeeze, before she then said "Well, you need to get ready Steve! Because you are going to get my wonderful daughter pregnant! You are going to be a dad! And you are going to do it, as soon as possible!"
"But, I don't want to be a dad, right now!" I replied back unhappily again.
Alice's mother took a deep angry breath, and then glanced back at the others still on the beach, before she then looked back at me, and said "Well, I don't care what you want Steve. My lovely beautiful daughter wants to be a mother, and she wants you to be the father, so, change your mind, or, I'll change it for you?"
I stared back at her, knowing she probably could, but, would she really risk trying to do it, in front of her husband, and her daughter.
So, bravely I replied back "No. I'll get Alice pregnant, when I'm ready!"
Alice's mother glared angrily at me again, clearly infuriated with my response, before she replied "Oh, you are so going to regret those words!"
I then felt her hand squeeze my bulge again, and I instantly groaned louder in discomfort, before she then started to caress and fondle it, and I then moaned in pleasure.
"Oh god! No." I then muttered in disbelief, that she was doing this, in such a public place.
"Oh yes, Steve!" she replied firmly back.
Her hand, hidden under the sea, continued to fondle me, and quickly I began to grow and get hard, until my firm dick was poking out of the top of my shorts.
As soon as mom could feel my boner standing to attention, her other hand joined in, and eagerly, she took hold of my stiff length, and pulled it free off my shorts.
Her soft wet hands then held my erection firmly, and as she gripped it tightly, she said "Change your mind Steve, or I'll do this! I'll make you fuck me in front of your wife, and your father in law! I will!"
"Please don't!" I replied nervously back.
"Then say you'll get my daughter pregnant?" Alice's mother asked back.
"I...I... I can't." I replied defiantly.
"Fine!" my mother in law then said firmly.
She then moved even closer to me, and under the water, I felt her move my hard cock, until I then felt her warm soft wet flesh touching it, and in an instant, my cockhead slipped inside of her.
"Oh yeah!" she then moaned softly, as the first few inches of my member slid inside her pussy.
Alice's mother then pushed more of my firm cock inside of her, and as she did that, she leant back in the water, and sighed happily.
As she then floated on her back, impaled on my dick, her long skinny legs lifted up and wrapped around my waist, holding me in place, before she looked directly at me, and started to steadily slide back and forth along my length.
"Oh fuck!" I moaned softly in pleasure, as I felt my mother in law's warm wet pussy, moving up and down my firm member.
"Yes, feel my little pussy! Doesn't it feel so good, sliding up and down your big dick? Don't you want to cum in it?" she then asked playfully, before adding "Now just imagine that's Alice, just imagine that's your beautiful young wife! Don't you want to cum in your wife?"
I groaned again in pleasure, because she was right, it did feel good, and I did want to cum in it, but, I also didn't want to be a father yet, so, I had to fight the urge to agree with her.
"But I'm not ready! I'm just not ready!" I pleaded back.
"You've said that before, and look how that turned out!" she replied back sarcastically, before she continued to slide back and forth along my hard member.
"Oh shit!" I then muttered in delight, as my wife's mother continued to ride me.
In that warm sunshine, in that warm sea, in front of so many people, and our family, my mother in law happily continued to plunge her little wet cunt onto my hard cock, and I have to admit, I was enjoying it, but at the same time, I knew she was only doing it, to try and convince me to impregnate her daughter.
"Oh Steve! Don't you see, having a child is a wonderful thing, and it would make Alice so happy! Don't you want to make you wife happy?" she then asked.
I groaned again in pleasure, as she kept fucking me, and then replied "I do. But... just not yet!"
Alice's mother immediately looked annoyed, and then started to move faster, up and down my firm dick, and pretty quickly, I began to feel her soft wet butt cheeks smacking into my balls.
"That's not good enough, Steve!" she then said firmly.
"You will get my daughter pregnant, and you will do it soon!" she then said firmly.
It was like she was trying to Jedi mind trick me or something, but, despite her best efforts, and the wonderful feeling of her mature wet pussy moving back and forth along my length, I continued to resist.
"No. I don't want to! We're still young, we have time!" I replied defiantly back.
However, my hot blonde mother in law wasn't going to accept that, and keenly she continued to move up and down on my thick member.
We were both now groaning and moaning in pleasure, and as we floated in waist high water, I wondered for a moment, what it must have looked like to everyone back on the beach.
But I didn't have time to check, because, with one last plunge, my mother in law sunk deep onto my cock, and then tossed her head back, and groaned happily.