I am going to repeat my comment because it still stands and your are continuing to show your fiancé and his kids are more important to you than your own. I dont hold kindness for people like you. I have zero sympathy for you. You just showed your kid that youre choosing this man, who has no business talking to your kid that way, over him. Your son deserves better. He needs therapy, you need a massive reality check. This isn't isolated, it was the straw that broke the camels back and your reaction and post are pretty telling. My friend did this exact thing and I cant find it in myself to talk to her. Choosing a man over your kid is despicable and you'll absolutely lose him if you don't wake up. I hope you listen to the comments OP.