All characters in this story are over 18 years of age.
The slow burn to incest started in part 1. In this chapter, things develop until I finally admit to myself that I want to have sex with my mother and my sister.
Some days passed. I kept stealing glances at my mother and sister. It's surprising how many glimpses you get when they're not paying attention -- some side-boob here, an upskirt panty glimpse there, bent over... They seemed to be bent over so often I wished I had a camera to make an album.
The most memorable of these was mum working in the garden. I happened to look out the window from Emma's room -- I had put a pile of fresh sheets there for her -- and I saw mum clearly pulling her panties up under her loose skirt. I could think of no other explanation than that she'd peed in the garden.
One fine early summer day, we're getting ready to go to the beach. Mum and Emma had decided to put their bikinis on under shorts and t-shirts and carry their dry change of clothes in their bags, as we all usually did. I had my ear buds in listening to something loud and heavy, so I didn't hear them in the lounge room. I walked in and there they were, both in bikini bottoms but no tops. I turned and walked out, apologising. In my mind I realised that Emma's bottoms were yellow and mum's were dark blue, and each held the bikini bra of the other in their hand so I figured, as usual, they were trying each other's things on.
And I'd seen the four prettiest tits in my world when they did.
Black Reef Beach is perfect. It's long, sandy and sheltered by cliffs. Best of all it's rarely got more than half a dozen people because it's way off the beaten track.
Mum had settled for the dark blue outfit. Emma went for a swim as soon as we'd arrived. She'd already lotioned up but mum had forgotten to do so.
"Oh honey undo the back of my bra for me."
She held the cups to her breasts as I lotioned up her back, kneeling behind her. I stroked her slowly, partly as a son's caress and partly to prolong the time I was looking down her cleavage. On my side strokes my hands glided over the soft flesh of the sides of her breasts and on the downward strokes, I ensured she was fully protected from the sun by applying lotion just inside her bikini bottoms too, and I was surprised at the sudden erotic tension I felt when my fingers went to the tops of her bare buttocks. Then she lay on her stomach, and I sat beside her in the soft sand, occasionally catching glimpses of the squashed sides of her ample boobs.
Emma came back dripping and stood on the other side of mum breathing heavily from her exercise. I looked at her breasts and flat stomach appreciatively, but mostly my eyes were drawn to her erect nipples poking at the yellow fabric as she swept through her hair with her towel. She caught my eye, looked down at her cleavage, then shook her head at me playfully.
After a few minutes, Emma was talking softly to mum. The only part I heard clearly was mum saying: "Ask him!"
Then Emma said: "OK. Mike? Would you be freaked out if I went topless?"
Hell yes, and I'll need some alone time or a cool swim...
"Um, no. If you're OK with it, I suppose not."
"Good."
And off came the top. I turned my head away, I guess she must have applied lotion to her bare breasts and I half wished I'd seen her do that but mostly I just wanted to pretend my cock wasn't paying attention. It was a losing battle when mum said: "Well, if her boobs don't bother you, I hope mine won't!"
Oh shit are you two serious?
She rolled on her back and ditched her bra. They both knew I was looking so I complimented them: "Y'know you two have the best boobs..."
Emma: "On the beach?"
"Haha. Yeah. Even though we're alone. If it was Bondi Beach in mid-summer, you'd still win."
"Mum, did you raise a pervert. He's looking at our tits!"
"Hush, child! Don't make me blush. Jesus Mike, they're just breasts!"
And Mount Everest is just a hill.
"Yeah, but they're my mum's and my sister's breasts."
Mum looked at me and blushed a little, but she did not cover up. I pushed my joke a little, but it was close to the truth: "Too much gorgeous female flesh here. I'm gonna cool of in the water."
I heard them giggling behind me as I jogged to the water's edge and dived in. It silenced my cock, for the time being. I swam around for maybe fifteen minutes, then confident that my dick wouldn't give me away I began walking back to my family. I should have maybe waited another couple of minutes.
Both Emma and mum were rubbing and kneading their breasts to apply more lotion. Sitting up like that, the full glory of those four glistening orbs drew my eyes like magnets. I couldn't turn away or they'd know I was 'uncomfortable', so I tried to sit and dry myself casually.