She's an American citizen and was in the US at the time. I was in Cambodia.

Nope, pretty sure that wasn't the case. We aren't aware of any such setting. What's really funny is that the context wasn't sexual at all. It was a medical conversation with a family member. I'd gotten the HPV vaccine earlier in the day and we were talking about it.

The image in question was from an online medical resource, and it didn't flag the image itself as I ended up sharing it directly with her anyway. I think it got flagged because the string had the letters sex in it. Or, if someone else had flagged it for some reason elsewhere... Who knows?