Wouldn't have wished Carol on her. Besides, she was the product of a first cousin marriage (that ended badly) and for that and various reasons, like personality, neither Ernie nor Missy might not have gone for it anyway.
There was a sweet story about her putting her arm around David's neck as they sat during Queen Victoria's funeral service. One princess, I forget who, remarked what a darling pair they made--shades of Ileana and Alexei of later years. I wish there was a picture of the first two like there is of the latter.