The day I ended up having sex with my sister was one of the best days of my life, but the following week was like hell. With Covid restrictions in full force, my sister and I were in the house nearly all the time but so was our step mum! I even tried to persuade my sister to let me sneak into her bed in the middle of the night, but she wouldn't risk it.
"You know how we can stop having to sneak around!" she said with a smile. There was no way I would risk what she was suggesting, but I was horny as hell.
A bit of catch up for you - my sister had discovered that I had been writing stories about her, our step mum and loads of other people on Literotica. I expected her to freak out, but we ended up having the most amazing sex together as she allowed me to cum in her mouth, her pussy and even her ass! She wanted us to try and seduce our step mum as well, but I feared this would ruin everything. I struck lucky with my randy, big titted sister, Beki, but surely our step mum would not react the same way. Our dad was working most of the time in shops and seemed to be missing a lot as well somehow. My sister didn't have a lot of time for him, and I didn't either really but he was still our dad. I dreaded to think of the consequences of an attempt at getting my 30-year-old step mum to have sex with us going wrong. Not that I hadn't fantasised about it going right! Louise was only 9 years older than me with long blonde hair and a figure to die for. Quite what she saw in my 45-year-old dad I'll never know, but in the last couple of years I had been really turned on lusting after her. I'd also lusted after my sister, Beki, since she turned 18 and we had shared a drunken kiss at her birthday party. I'd never imagined those fantasies becoming reality, but it was too much to think that both of them would!
The Friday after Beki and I had fucked, our mum had finally gone out to go shopping. I left it five minutes then went to my sister's room.
"No Tom!" she said as I slid up behind her and put my hands on her tits. "Mum is not out for long. We can't risk it!"
"Come on Beki, you know you want to!" I whispered as I leaned in and kissed the back of her neck whilst I continued to cup her gorgeous breasts.
Beki let a soft moan escape her lips, but she still tried to be firm with me.
"Just imagine if you would help to get mum into bed," said Beki. "You could have either of us whenever you wanted when dad isn't home! And that's a lot of the time!"
"I need you Beki!" I whispered in her ear as I slipped my hands under her top and tried to pull it over her head.
I knew Beki could feel my stiff prick poking into her bum and felt I was wearing her down.
"We really shouldn't!" said Beki as I managed to pull her top off her followed by her bra. I turned her around and leaned down to suck one of her tits into my mouth. Her nipple was rock hard, and I swirled my tongue around it causing Beki to let out another moan.
"I suppose if we are quick," she said as her hands dropped to undo my pants and she gave in to her own pent up lust. My boxers swiftly followed, and her hand wrapped around my engorged member. After a week of just masturbating and fantasising in bed, I was surprised I didn't lose it there and then as she began slowly pumping up and down my hard shaft.
Sinking to her knees, Beki slipped the tip of my engorged cock into her warm mouth and began to gently suck. She ran her tongue over the head of my penis and licked the slit of my knobhead. Now it was my turn to moan as she began to slide more of my solid cock past her full lips until I was bumping up against her throat. Beki pulled up for air and then proceeded to swallow even more of my throbbing prick till I felt it go into her throat. She lovingly cupped my balls as she allowed me to start pumping in and out of her mouth with gusto.
I started to feel my meat throbbing as she expertly worked on my solid shaft and ran her tongue around the rim of my bulbous knob. Just as I was about to explode, we heard footsteps on the stairs and realised mum had come home without us realising. Quick as a flash Beki dived under the bed sheets and lay as flat as she could.
I had nowhere to hide and as our mum threw open the door, I couldn't hold back a torrent of cum that flew out of my penis as my mum just stopped and starred. I went beet red and our mum went beet red before she shut the door again and fled downstairs.
"How are we going to explain this?" I asked Beki as she emerged from under the covers.
"Maybe say I was out and you sneaked a girl in," suggested Beki.
"Who? And why would we use your room?" I stammered.
"Maybe Jane and hope she doesn't ask anything else," Beki tried to suggest.
As it turned out, our step mum's response to the whole incident was not to talk about it at all which was something of a relief. Although what she was thinking was a bit of a mystery to me, my night time fantasies started to fixate on the way she had starred at my hard cock as I shot out a load of spunk in front of her. Was she just disgusted, or maybe I had detected a hint of lust in her eyes as she stood there for what felt like ages but probably was no time at all. Still, I added the incident to my dreams as I imagined that instead of fleeing she had dropped to her knees and licked my cock clean and swallowed my sticky load. Of course, all this was just fantasy and in reality Beki and I endured more days of tension and awkward times around mum until dad dropped a bombshell on our family that would change our lives forever.
It was Saturday afternoon when mum got a call from a friend and went to her room very upset. She wouldn't tell Beki and I what was up, but we soon found out as my dad arrived home and she went to confront him.
"How could you sleep with my younger sister?" screamed Louise at my dad.
Beki and I were in the lounge and could not believe our ears as our dad struggled to make a response.
"Its not true!" he stammered, but mum was not in any doubt.
