So, a few days ago me and my boy were at my sisters house. We all decided to sit down on the sofa and watch a film. My sister and quite the chatterbox and I know for sure that my son likes to concentrate on films so he does not miss any important bits. My sister tried to make a remark about the scene that was happening but my son keeping his eyes glued to the TV covered her mouth with his hand effectivley gagging her. She tried to speak under his hand and then started making muffled sniggers under his hand. He removed his hand about a minute later still watching the TV. My sister did not seem fazed by it. As it was happening I saw my sister was laughing and seemed completely fine so I just smiled and continued watching the film. Should I have stopped him?