If your kid is witnessing a scene at home then don’t be surprised if he gives you an input or two on the same. As your kid's mind is developing, so is his skills to read the situation and respond to it accordingly.
What you need to know:
If you will ask your kiddo not to speak even when he wants to this may not go well with him. Let him speak openly and express his feelings about the situation. If you think he is not speaking right, correct him do not scold him for speaking up. Scolding will only bring his confidence down.