He jerks off onto her face

On the eve of her first date with a boy she has liked at school. Her big brother tricked her into believing she had better have some practice before hand in case he wants her to touch his penis. He explained to his wide eyed sister "That all guys on a date want the girl to at least touch the guys penis. ( Truer words were never said ) She should be prepared to know what to do and what it is like when a boy cums ". She sheepishly and then excitedly asked " Will you show and teach me what I should know ". He replied " Sure I'll teach ya but Mom and Dad must never know you learned anything about it from me. "