If you know the daughters names, then if you find their births in the birth reg index, it will give mothers maiden name and lead you to the marriage.
But, just having a quick look at marriages for George L Benteys, the only possible one where the bride may be a "Kay' is one where bride is Kathleen .
Cant give full details, as if this isnt yours they may well still be alive.
But, if you know the daughters names you should be able to get it.