Just gonna say from the top that this is disappointing, I wish I knew if there was more to it. My wife & her best friend lived in an apartment together after college. Both are now in mid-40s.
She’s told me many times that they took showers together in those days. It’s even been discussed with the friend around, so I know it happened. Her version is that they just jumped in, either to save time or “share hair products”, which was the excuse used when they jumped in a campground shower together while at the beach with my wife’s family.
They both say nothing happened, are both fairly conservative, & neither have shown any tendencies toward being bi. They do have a very close relationship with each other, and have since middle school.
All the time I’ve known about it, I’ve wondered what, if anything, really did happen, cause I know that neither of them would want it to get out of it did. When I ask about it, which I do fairly regularly, my wife says it was nothing, there was no “touching” and it was innocent. But, two very nice looking 20-somethings in a small shower together drives me insane thinking about it. Wouldn’t be upset at all, I’d be thrilled, I just wish I knew. And I wish there were pictures. There is one, but it’s my wife peaking from behind the shower curtain, only her face is in view.