I find few things more infuriating than white people talking just to hear themselves talk and to step on the moment of someone they know.
Dear White Markles,
I say this with the utmost sincerity:
SHUT THE FUCK UP.
You are not special just because your family member is famous. It seems to me that, if you are being this shitty now, you were shitty the whole time she knew you and thus had every reason to stop talking to you.