According to TMZ, John Cena's soon to be ex-wife Liz is convinced that John was cheating on her during their marriage, and she is looking to prove it.

Liz's attorney Raymond Rafool says they've been getting tips that Cena had been messing around during the marriage, which according to him, if true could be grounds for Liz to challenge the prenuptial agreement. Rafool added the following…

"We're definitely following up on every lead relative to his being unfaithful before AND after the separation."