I think P.C was under a lot of pressure to find a 'suitable' bride, none more so than by his grandmother the Queen Mother, it is said that both she and Diana's grandmother Lady Fermoy , a confident of the Q.M, greatly encouraged this bethrothal, this, along with other family pressure was understandably difficult to repel. Diana was not a novice in the ways of the RF, her sister dated PC and the families moved in the same social circle including each others all her life. Her father Earl Spencer was an Equery to George V1th . Unlike Catherine and Sophie Wessex, Diana , contrary to public opinion was not unfamiliar with court proceedings.