Example of fren's mother, her father & his mistress who bore
him two sons.
It got to the point, where the mother changed her NRIC to Mrs
Tan Tong Tang nee Ting Dong Mui (something like that.)
So that everytime she goes to the office or go out
socialising.
Everyone will know that she is the original Mrs Tan, while the
mistress always has to reduce to being known as Ms Tan every time
she is around.
Those in the know.....will have no problem calling the mistress
Ms Tan whenever Mrs Tan is actually around.
Those not in the know.....are given a name card with the above
name and salutation printed on it, to tell the person off.
Especially when its a official occasion where both Mrs Tan need to
be present.
People usually call the Mistress Mrs Tan too.....