Sexting in a group conversation; requiring at least 4 participants (3 participants is a Ménage à text).
I had no idea how real texting can get until I engaged in a group sext. There are words burned into my eyeballs that I cannot unsee.
Sexting among three or more people via SMS or some other messaging app.
Bob: I looked on Jenny's phone and she was group sexting with these two guys from another school.