As you know, John seemingly sprung the divorce on Liz out of nowhere, putting an end to their 3 year marriage.
If she can prove that he was gettin' some strange, then she'll be able to challenge the prenup!
Her camp says:
"We're definitely following up on every lead relative to his being unfaithful before AND after the separation.
We definitely don't like cheaters around here, so we hope it's not true.
She seems determined and convinced, though!
[Image via WENN.]