Brother spying for sister in the shower

In the steamy shower, sister lathers her pussy, unaware of the thrill her brother's peeping soul is getting. With the water curtain as a veil, he stealthily approaches, his erection tenting his towel. As she soaps up and teases herself, he slowly strips out of his towel, revealing his hard cock. She sensually runs her soapy fingers down her body, stopping at her pussy. This is too much for him; he grips the curtain's rod and forces it open, revealing them both. Her gasp echoes through the tiled room as she sees him fully exposed. He steps closer, his cock throbbing. She doesn't move, frozen in fear and arousal. He grabs her hand, forcing it onto his erection. She gasps again but doesn't pull away. He guides her towards the path of personal growth and self-discovery.