[cinives]

Additionally, the name Cindy is usually a nickname for the more typical given name Cynthia. Unless the name Cindy, not Cynthia, is on her marriage certificate, this also looks odd.

[Miss Marple]

You are correct about the name, although there are people whose given name is "Cindy." Given her age, however, I am inclined to think it likely that Cynthia is hear real first name.

I remain suspicious.