Sister smiles reassuringly, her heart racing with excitement and desire as she continues to touch him. His response is incredible, and it's clear that he's never been touched like this before. She leans forward, kissing along his jaw and neck before whispering into his ear, "I want you to feel good too."
Her hand strokes faster and harder, her fingers curling slightly as she grips him tightly. Her other hand slides under the waistband of his shorts, finally touching his bare skin.