I think reputation is very much in the minds of Marina & Olga's mind when they conduct themselves. Ellen herself was happily married until her husband died. All three of her daughters had happy married lives too. It was harder for Queen Elisabeth, The Queen Mother to do the same with Princess Margaret, as the times were changing. Princess Margret had all the beauty and glamour of her Aunt Marina (whom she had idolized since a girl), but without her discretion. Which explained why Marina's daughter Princess Alexandra is still today a hard working royal, without scandal (except for her daughter Marina, who went through a phase) and quietly elegant like her mother.
Both Princess Margaret (born 1930) and Princess Alexandra (born 1936) had conscientious upbringings and were born in the same generation.
Whatever the era born or the parental dedication/marital respectability of the parents there is no guarantee that their children will not go off the rails.
i.e.,--
King George 111 & Queen Charlotte (George 1V, William 1V, Frederick of York, Edward of Kent, etc.)
Queen Victoria & Albert (Edward V11, Prince Alfred, Princess Louise.)
George V & Queen Mary (Edward V11, Prince George.)
George V1 and Queen Elizabeth (Princess Margaret)
Grand Duke Michael and Cecile of Baden (Grand Dukes Nicholas, Alexander, Serge & Princess Anasatsia)
Alexander 111 & the Empress Marie (In the marital realm Xenia, Olga, & Michael.)
Princess Zinaida Yusupova & Count Elston (Nicholas & Dimitri)
Grand Duke Paul and Princess Alexandra/Olga Paley (Marie, Dimitri, Irene and Natalie.)
Kaiser Wilhelm & the Empress Augusta (Most of their male line.)
Louis & Victoria of Battenberg (The highly dysfunctional union of Louis/Edwina Mountbatten)
Prince Paul & Princess Olga of Yugoslava (Princess Elizabeth)
Prince Rainer & Grace of Monico (Take your pick.)
ETC.
Ditto high profile aristocratic couples:
Lord Curzon Viceroy of India and Mary Leiter (Irene 2nd. Baroness of Revensdale & Alexandra "BaBa" Metcalfe of notorious legend.)
Winston and Clementine Churchill (i.e., Scum Dandy Randolph, also Diana & Sarah.)
Waldorf & Nancy Astor (Bobby Shaw, Waldorf, David, Michael, John. Arguably, Phyllis.)
Lord and Lady Redesdale (The entire Mitford motley, save the Duchess of Devonshire.)
ETC.
The "most likeable" Grand Duke Paul should be credited as being responsible for the upbringing of HIS OWN children Marie (born 1890) and Dimitri (born 1891) since, with the exception of the 2 years approximate when the children were under the sole guardianship of their uncle the Grand Duke Serge (Nov. 1902-March 2005), both siblings were under the custody and influence of their father or the Grand Duchess Elizabeth. For the record, it was the Grand Duke Paul's decision that Marie and Dimitri spend their summer holidays with Serge & Ella which Marie admitted were the "happiest memories of my childhood"--just as it was Paul's decision to abandon his two motherless children in favor of his married mistress & their secret illegitimate son. The "perfect marriage" of the Grand Duke Paul and his second wife were soley responsible for the upbringing of Natalie & Irene.
Generational?
Note that although Edward V11 and Queen Alexandra parented Albert Victor (Duke of Clarence) and Prince George both children grew up to have very different characters,--as did George V & Queen Mary's sons Edward (Prince of Wales) & Prince Albert--as did George V1 & the Queen Mum's Queen Elizabeth 11 and Princess Margaret.
In fact, 3 out of the 4 children of Head Of Church and State Queen Elizabeth & Prince Philip chose not emulate their parent's duty to the monarchy, i.e. their marital steadfastness,--although are making amends in their 50s & 60s.