It's also on Zara's stories.
One thing that's very noticeable between Zara & Louise is that Zara seems to have lots of friends and also has a social life as she's often out with her girlfriends. In contrast, Louise's life, even before she had the baby, seems so empty and sad. The highlight of her day was often just making a phone call or putting on make-up or taking the dogs for a walk.
I do wonder if Louise is the type who just can't stand it if she's not the centre of attention, hence why she's so unhappy all the time. Zara's apparant successes must be hitting her like a ton of bricks. Very interesting body language how at the party she's noticeably sitting apart from Zara's friends.