(go with me on this)
Your father is Lord Badger, Marquis of Sleasby
You are therefore born Lady Wilhelmina Badger.
You marry George Weasel, Earl of Coddingham
and therefore become Lady Coddingham
but
then he divorces you and remarries
You are obv no longer Lady Coddingham as there is a new one
but do you
a) revert to your maiden name and style (Lady Badger)
b) retain your married surname but revert to your maiden style (Lady Weasel)
answers on a postcard before this wretched party on Saturday...