Marina blushed deeply, her cheeks flushing a shade of crimson that betrayed her mix of embarrassment and arousal. "Jack...don't..." she whispered, her voice trembling with a hint of pleading. But I knew she wanted this, needed this, even if she was too shy to admit it.
I reached out, my fingers finding her hard nipples through the sheer fabric of her lingerie. I pinched them, rolling them between my thumb and forefinger, applying just enough pressure to make her gasp. She threw her head back, a moan escaping her lips, "Aaaaah, Jack..."
Her eyes met mine, wide and filled with a mix of shock and desire. I could see the pleading in her gaze, the silent beg for more, even as she blushed with embarrassment.