Hi Lookout
I think SC suffered from such low self-esteem that that's all she thought she was worth. I really don't think she ever had a "good life". She turned to the soft porn modelling out of desperation.
Excerpt from Claire Powell's book:
'She did it strictly to get money. I think it all went back to Bambi's uneasy realationship with her parents.' claimed a friend. 'I think she felt her father in particular was disappointed in her. Not angry, just disappointed that she hadn't done more in her life. He wanted her to make something of herslef. I think that's why she was so keen on trying to get a job - apart from the fact that she had no money - it was to show her father she was managing.'
NaNu/et al

I feel I must ask your forgiveness in advance for what I'm about to suggest. I've known many girls with Sheila's background. Rarely do they seek permanent employment because their social life takes up the majority of their time, weekend starting Friday morning and ending Monday lunchtime. They do a little secretarial work for their family business OR the odd spot of waitressing in a wine bar owned by a friend, just for fun, but in the main it's killing time until Mr Right comes along.
Having read all the posts about Sheila's various jobs, I've found myself wondering if Sheila really wanted to work!!!! There, I've said it!!! She had the advantage of finishing school, but I don't know if she did actually finish, however she would have learned flower arranging, she would certainly have learned how to cater for dinner parties and run a charming home but she seems not to have used anything she learned. In stead, she tries her hand at hairdressing, long, long hours, hard work, and in the mid 70s, paying around £6 per week plus tips if the client liked the way she shampooed. I suspect Sheila liked the idea of glamour more than the idea of work which is why modelling appealed to her, but modelling requires a self discipline I imagine she lacked.
Maybe all she ever really wanted was someone to love her and babies of her own to hold. Maybe she wanted what she thought June had, a husband who provided her with a good life, paid the bills, and gave her an allowance.