I don't understand how she studied child care at university, she treats parenting as a joke. I'm not sure if she thinks it's funny to be ditzy and constantly forgetting, makes her more relatable. How did she run her cleaning business? Surely organisation and planning was vital, so why can't she transfer that to her home life. I think a lot of Serens behaviour is in response to the complete disorganisation in that house. She has her dad next door, so has support very close. I think she's enjoying her single life and sometimes seems to let home/parent life take a back seat