More than just billie?(Girlfriend of my brother)

Soft touches (NSF)

As the movie continues to play, the tension between Billie and me becomes overwhelming. Her touches grow bolder, and although I know my brother is just a few inches away, I can't help but completely lose myself in this moment.
Billie's hand slowly slides under my shirt, her fingers touching my bare skin.
She gently traces her fingertips over my stomach, leaving a trail of heat. My breathing quickens, and I struggle to stay calm to avoid drawing attention to us.
Her hand moves higher, and when her fingers reach the edge of my bra, I catch my breath. She slightly lifts her head and looks deeply into my eyes, as if to ensure I'm okay with this. I give a barely perceptible nod, and a faint smile crosses her face. Her fingers slip under the fabric of my bra, and when she touches my breast, an electric feeling surges through me.
Billie's touch is gentle but firm.
She caresses my breast, her fingers circling my nipple, and I have to work hard to stifle a moan. My brother, engrossed in the movie, notices nothing. Billie takes the opportunity to move her hand further, her fingers exploring every inch of my breast. Her touch is incredibly intimate, and I feel my entire body responding to her tenderness.
"Billie," | whisper breathlessly as she gently massages my breast. "We have to be careful."
"I know," she murmurs back, her voice barely more than a whisper. "But I can't stop. You drive me crazy."Her hand moves lower again, this time even bolder. She strokes my stomach, down to the waistband of my pants.
Her fingers play with the button, deftly opening it, and then her hand slips inside. I feel her fingers gently brush over my underwear, and my breathing quickens further.
Billie smiles slightly as she notices how much I react to her touch. She slides her hand deeper, her fingers slipping under the fabric of my underwear. When she touches me there, a wave of excitement washes over me. Her fingers are skilled, knowing exactly how to touch me to drive me wild.
I close my eyes and savor every second of this forbidden closeness. Billie's fingers move rhythmically, and I feel the tension building in my body. I have to hold myself back from making noise as Billie brings me closer to the edge of madness. Suddenly, I feel my body tense, and I know I'm on the brink of climaxing.
Billie's touch grows more intense, and I bite my lip to stifle a loud moan. As the wave of ecstasy crashes over me, I feel like I'm exploding.
Billie slowly withdraws her hand and smiles at me, satisfied with what she has achieved. My body is still trembling from the aftermath, and I try to regain my composure.