Definitely agree with the Streisand effect ,don't see anything remarkable suzys love life . I suppose if you want to nitpick prehaps the only judgement I would pass is sleeping with married men .While we don't know if this is gospel or what stories of woe were being spun by these men to suzy . This would portray more of a negative image of suzy at the time and I can understand any mother not wanting that revealed but a young woman keeping her options open in the dating world was normalish for the time .women for most parts were moving away from the expected housewife role and becoming career focused .My impression is that DL wanted SJL remembered as virginal, saintly, beautiful and innocent. She wanted this thought of SJL more than she wanted her presumed killer* brought to justice. If a trial and conviction had entailed the disclosure of what DL would have considered a shameful private life, DL would rather no such trial happened.
Her actions and words then and since make more sense if this was what was animating her. The inaccurate recollections, the management of witnesses, the editing of information given to the police, the successful attempts to censor AS' book and even the publication of photographs which SJL no longer resembled but in which she was better looking than was really the case, all point to this.
SJL's actual private life is possibly an early example if the Streisand Effect. Probably there was nothing very remarkable to see or know but if you try to shut it down you're just going to provoke interest in it.
* if someone disappears without trace it's pretty likely she's been killed
I also can imagine if a conviction and trail had happened DL would have seen to it that it was private behind close doors and tried to sue any newspaper that tried to publish the finer details. Seems DLs image was much more important and as Cherwell states typical behaviour of the narcissist. Its all about them and no one else matters even a missing daughter