She could... as long as it suited her purposes

My mind was a haze after my intense ejaculation, and I only dimly remember Anna gesturing for me to leave with a small movement of her head.

I returned to my room, drained and more confused and ensnared by my sister than ever. Without a word, she'd tempted me, utterly dominated me, gave me the strongest orgasm of my life, and dismissed me without answering any of the unvoiced questions swirling in my head.

Our mutual masturbation came so close to the forbidden act that I couldn't help but feel a desire for the real thing... I felt a sharp pang of jealousy when I considered that Mike may have done so before me, and may even be doing so on a regular basis.

I slept fitfully, my mind fixated on the unanswered and increasingly important question: what exactly was my relationship with Anna now?

Unfortunately, she didn't seem to be in a hurry to let me figure that out... the next day, she resumed her teasing, as if nothing had happened the night before.

After exiting the shower in the morning, she lingered in the kitchen doing minor make-work, wearing nothing more than a towel for what seemed like an eternity. My cereal went soggy as I stared transfixed, already **** to repeat last night's events - and maybe more - once night fell.

I wanted her so badly, and wanted to know just as badly what was going through her head as she teased me with a nearly complete view of what lay hidden beneath the bottom of her towel for the dozenth time...

But my attempt at calling out to her was met with a mysterious teasing smile, and a finger pressed to her lips... maddening!

Finally, as if to entice me even further, she deliberately dropped a spoon on the floor while standing only a few feet away from me. My heart pounded as I realized she was standing upright, waiting patiently while looking straight at me expectantly.

If I went over and crouched down to pick it up...I'd have a clear view up her towel and at her exposed lower body. I'd be able to see her pussy from just as close as last night.

I couldn't resist; I got up and began walking over, only for Anna to casually stroll away just before I finished crouching, leaving me unable to see a thing. She gave me a knowing smile as she left to change.

Her day's outfit made it so the teasing only continued when I ran into her next; a revealing white tank top left a generous amount of cleavage exposed, and her denim miniskirt left almost as much exposed as the towel.

She seemed to go out of her way to find reasons to bend over, leaving me with a vivid mental image of her panty-clad ass. It was all I could do not to race back to my room to masturbate...but I got the feeling that Anna wouldn't let me off if I tried escaping her teasing the easy way.

All I could do was endure the whole day as Anna incessantly flashed her luscious cleavage at me, and gave me perfect views of her amazing ass.

As if to muddle my head even further, Anna pointed to her skirt after flashing me it's contents, conversationally informing me. "Mike bought this for me, you know. He loves the way it flips up so easily."

I felt a surge of bitter jealously at the thought of Mike ogling Anna's ass underneath her skirt, but couldn't determine why she'd tell me... the signals she's sending were mixed so badly that I couldn't figure if she wanted me, or just wanted to tease me...