Six!

'I met Ezekiel Young from
Salt Lake city about two years ago
and he told me he was single
and we hit it off right away.
So, we started living together.
He'd go to work, he'd come home,
I'd fix him a drink,
We'd have dinner.
And then I found out,
"Single" he told me?
Single, my ass.
Not only was he married...
Oh, no, he had six wives.
One of those Mormons, you know.
So that night, when he came home,
I fixed him his drink as usual.
You know, some guys just can't hold
their ARSENIC.'

(Cell Block Tango, part 02)