Frigg had a fair idea of the basics of what was going on by the time she found her son and she was not happy about any of it. Not the part where Dionysos had her son's phone and had sent her dirty texts firstly. But definitely not the part where a Sumerian and an Egyptian were about to kill each other and for some reason Hermod felt the need to be right smack in the middle of it.
“What in Hel is going on here?” She chided him immediately. “If these two are going to kill each other, fine, but there is no way I am losing my only living child today, we're leaving. Now.” Frigg have Hermod a very stern look to state that she was not leaving any room for argument. “And we need to retrieve your phone from Dionysos, do you understand me?”
Not he needed to. It was plural. They needed to. Because Frigg wanted to wipe the contents of that text message herself. There were somethings that were better if Hermod didn't know.