Two weeks ago I woke up in the middle of the night and saw my son talking to one of his old friends out my window. I went outside and they were having a heated argument and my son was saying he was blackmailing him. And his friend was telling him he can call it whatever he wants. I was trying to listen before intervening so I could understand the situation and from what I understand there is something about a video his friend and threatening to post and it sounds sexual because my son mentioned this being blackmail, extortion and child porn. That's what I got from the situation and my son told him he'll do what he wants but to as least be honest himself about why he did this because his friend was saying he did this to do God's work and my son said "At least I'm honest with myself. I know who I am. Just admit you did this to me because you're faggot too." Then his friend grabbed him by the face and that's when I intervened and yelled and his friend got on his bike and drove away. I've been trying to get out what's going on for two week and he's not talking about it. I'm wondering if he would open up to a therapist but worried it may make it worse.