As we grew older, Sandra and I confessed fantasies and real experiences without jealousy and judgment. Sandra taught me that you could have any fantasy...absolutely anything...but you couldn't act on it. Discretion is key.
Just knowing that allowed us to share stories about things that had happened to us in our single lives. Things like her willingly sucking her much older Aunt's clit on a camping trip; or my lusting after a local male lifeguard's ass and tight bathing suit clad cock in my younger days. There was a tiny bi curiosity on both of our parts; I had witnessed it first hand when Sandra came like a woman possessed while sniffing the cum covered mailbox panties.
We noticed that the mystery panties odor had started to dwindle over time; and seeing as how we both had had awesome orgasms with them, I brought up maybe calling back to Bob's contact. Sandra eagerly agreed. I texted the number and asked if parts were still available? For a single day we waited...anxiously...and then the return text appeared. It asked for a description of how the panties had been enjoyed; and included a brief note that the next mail out we'd receive would be based on that description.
Of course the highlight of our description was Sandra finding me jacking off while sniffing panties; then discovering they were not hers, then sniffing them herself to a bi curious orgasm. I almost came again texting it back.