Recently I heard a theory that Mrs. Quagmire is Moxie Mallahan and Mr. Quagmire is Kellar.
I highly doubt it since if they were, Lemony would propably care more about the Quagmire children.
There was no typewriter as far as I saw in the Quagmire mansion in the series
and Mrs. Quagmire was known for writing poems, not being a journalist.
What do you think about it?