My curvy stepsister teases me with her underwear during a sensual massage

I've been harboring a secret desire for my curvy stepsister ever since she moved in. Her voluptuous figure, accentuated by her skimpy underwear, is impossible to resist. Every day, I find myself fantasizing about her, my hands eager to explore her soft curves. Yesterday, after a particularly grueling day at college, she offered me a sensual massage. As her oily fingers worked their magic on my back, I felt her underwear brushing against me, igniting a fire of desire within me. I could feel her warmth, her breath on my neck, and I knew what was coming next. With a devilish smile, she began to tease me, her hands exploring my body, her lips just barely grazing my skin. The tension built until we couldn't hold back any longer, giving in to our primal urges.