Alan and Alison met once again that night. She would have to catch the early flight next morning and this was their last chance to have diaper play together. Alan was wearing his own diaper this time. Melissa's were already in the dryer. They wanted to make love again but not before Alison asked him to produce yet another 'treasure'.
They had discussed this topic online several times before. Alan's penchant for sniffing Melissa's panties was well known to her and he was initially surprised by the way she had accepted it as normal.
"Show me!" she said breathlessly.
Alan pulled two pairs of Melissa's worn panties from his pocket and held them out to show her. To his surprise, she took one pair from him and held them up to her face. She quickly found the crotch panel and began to breathe the younger girl's erotic scent.
Alan sat there open --mouthed.
"Well, what are you waiting for big boy," she said. "Take a whiff of your daughter's panties. Show me how much you love her!"
He didn't need another reminder. He clumsily pulled the worn knickers to his face and breathed in the aroma he now knew so well.
Alison pulled the panties from her face and said, "She masturbated while she was wearing these."
"How do you know that?" replied a startled Alan. "How can you tell?"
"Here, take these and smell them." Alan did as he was asked. "Can you smell that tangy, strong smell?" He nodded. "It's not in every pair of panties is it?" He shook his head as he revelled in the heady aroma of his daughter's pussy. Alison sniffed the other pair of panties. "These panties are nowhere near as strong are they? You can smell her natural pussy smell but not that tangy strong aroma that comes from her really working her clit!"
Alan was shocked by her words. She really knew panties.
"How do you know so much?" he asked stupidly.
"Coz I'm a woman, you twit!" She laughed gently, then hugged him and whispered in his ear. "And because I sniffed my sisters panties more times than you have sniffed Melissa's!"