All characters indulging in sexual acts are of legal age.
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Recap: My sister Janine and I are the same age, 18, but not twins. Janine is five feet 9, with curly brown hair to her shoulders and fair skin. She's a little plump.
Last night I sneaked into her room, got behind her while she slept on her stomach and fucked her. Then I fingered her and I swear I made her cum in her sleep. Today was a very hot day, so hot that even in the air-conditioning I wore just shorts all day; Janine wore her bikini. She'd put on a kilo or so recently, so I loved the way her bum stretched the red fabric and the top cupped her tits snugly. I hadn't seen her in bra or bikini for a while, and noted she'd developed well in that respect. I guessed maybe C-cups, bordering on D's? Anyway, they were ample and held my gaze every time she moved.
After dinner, I chatted with her: "Gonna be hard to sleep tonight, Nini." (It was my childhood nickname for her).
"Sure will."
"Sleep OK last night?"
"Yeah, OK but not great. Mind you, I had a bit to drink, so that might have helped. I expect I'll toss and turn tonight though."
I hoped not.
Thankfully a cool Southerly change came through at 8 or so that evening and took the temperature down to comfortable levels. Janine stayed up watching TV, now dressed in the same nighty as last night, ready for bed. She sat with her legs bent underneath her, unaware I'm sure that I could see a triangle of white cotton between her legs, pulled tightly against her so that I saw three distinct lines - pussy lips and slit - for three or four centimetres. Sitting there in silky-smooth soccer shorts and T-shirt, my dick rose in salute. For the first time I realised how erotic the shiny fabric was against my cock.
Being sure not to stare, glancing occasionally at this delicious sight I thought I saw a darker patch right in the middle. I fantasised that she was horny and getting moist there. On my third or fourth look I made the mistake of lingering too long. Janine looked at me and must have realised where I was looking. She adjusted her pose and I no longer had the view, so I pretended to watch TV with her.
Maybe five minutes later Janine stood, walked towards the door, then cursed as she dropped something or other. With straight legs, she bent to pick it up. I have no idea what it was - my eyes were glued to my sister's bum, panties and camel-toe, pointing right at me just two metres away, nestled as they were in those lovely little cotton briefs.
My jaw dropped, then I wrenched my eyes away. Janine disappeared for a minute then came back and sat again, chastely, not showing much of anything.