I wonder if the miserable look is that she is being forced to examine her own life & is having some sort of mid-life crisis. What has she achieved? Every material possession she has, has been acquired with other people's money. She has a chateau that she managed to acquire with money from her parents; she has hardly earned a penny from real work in her life. Her current earnings are from ad revenue for a few YT videos. She lives a hedonistic lifestyle, again paid for mostly by others. She has not managed to sustain a lasting adult personal relationship and is now with a timid young boy, half her age, rather than being in a loving, supportive, equal partnership. Most of the friends, employees and others surrounding her are drifters who also have unfulfilled lives. The fans and people financing her life are needy strangers and sycophants who lack common sense and intelligence and are searching for 2 minutes of attention from a stranger, wanting to hear their names read out on what they see as a TV programme. Maybe she is beginning to see that this is what her life amounts to. She had a lot going for her when she was young; she had financial security and a place at Oxford, she also had, what seems from afar, to have been a responsible and socially aware spouse. Now, she lives in a crumbling chateau, unable to get anything properly restored and finished and all she can manage to do is to add to all the unnecessary material possessions and fripperies that actually don't bring contentment. Maybe she realises that all the potential she had has been wasted.
I think BJJ knew quite well that both SJ and Selmar were laughing at him, not with him. They both found it hilarious. Good for Selmar as I reckon they probably laugh at him a lot. I guess BJJ and SJ had a showdown after that! She's good at slapping people down and laughing at the same time and he responds by saying she is like her mother, which she hates!