Junes' expectations set a precedent for Sheilas' behaviour in her teenage years,,,rebellion.
It's all very well teaching your child good manners etc,,,but it's another when you try and mould them into your way of thinking. Children,,whether adopted or not,are individuals who should be left to build their own unique character and should be " guided " through their lives,,without regimentation.
Although both children in this case had a very good upbringing and start in life,,at the same time,,it was a pretty strict " regime " and I imagine,overbearing and oppressive at times where neither children were " allowed to be themselves ",,,not what I would say was a normal environment by todays standards of childcare.
I appreciate that things were a lot different in the 80's as" family values " were still being taught,,,and like all others,June and Nevill wanted the best grounding for their children,,,which works for some but not for others,and because Sheila and Jeremy were of different parentage to start with,,genetically this grounding worked for one but not for the other.
Saying that,,you can have exactly the same biological parents of children who are totally different in every way,,,so in a way it's a myth to say that adoptees are any different to biological children.
However,,getting back to Sheila,who was no different from some girls today who happen to mix with " the wrong crowd "and realise that they're missing out on life,,so follow their peers into drinking and drugs,etc ,,and if they're not careful,,descend in a downward spiral of either becoming an alcoholic or a drug addict or both. Dependent on their mindset,,,they'll either stop and think what they're doing to themselves or others,,or they'll go further down the route beyond redemption.
Because there was little or no understanding of Sheilas's behavioural problems as a teenager,,,whatever punishment that was meted out to her would have been the wrong punishment anyway,,and would have pushed Sheila further away from her parents.. The psychology of a growing teenager is indeed complex and takes a lot of understanding,,,for whatever you ask or tell them to do,they'll always do the opposite.
I imagine that Sheila would have been quite a handful,,especially later when she did rely on drugs,and possibly this is why Nevill kept a little supply in his safe in order to keep Sheila" going" rather than her seek a supplier elsewhere. However,,one drug invariably leads to a much stronger one which sadly Sheila yielded to,,,,cocaine. A drug,,which I wouldn't have thought was as readily available then as now,,plus more costly ( I don't know ) hence her having a large debt to her " supplier ".
Do we know who supplied Sheila with cocaine,,,and who the debt belonged to.?
Let it be known that a paranoid schizophrenic drug-taker,,,who also takes prescription drugs,,,,can move mountains,regardless of their size or whether it's a male or female. It's unklike any other illness because of it being so unpredictable,,,and they're known for skipping their medication and also for killing total strangers as well as family members once they're out of control. Fact.