. I took my kids to the country fair where they inadvertently ran into their mom. They noticed from a distance their M texting on the phone, and my D asked who she's always texting. My older S said I know, and then told me the OM name. He had brought this up with me before, and asked that it be our secret.
That sounded to me like the kids were seeing the texting of OM -- and often -- before the happenstance observation at the fair. And furthermore it sounded to me like his son was upset about it.