^^^ +1. If they were both in the same household during the tourney, there was a zero percent chance he was unaware of her hand. (And that is at best...at worst, he was playing both screens simultaneously.) Thus, collusion. I have amended my vote accordingly.
The game itself is suspect for allowing 2 users in the same location, but the same game is suspect if 2 users have each other's phone numbers. Thus, all online games are suspect.
Mrs Zombie and I have been playing a heads-up series. It's a serious battle for real money from our personal spending caches. We have completed 24 of the 27 scheduled events for the title of "Master of Poker".
This means we have literally spent hundreds of hours playing against each other. That doesn't count over 100 home games we hosted, other games we have travelled to, or casino we have played in together. All together we probably have over 100 hours together at the table.
We don't play online for basically this reason. If we are playing at our best, we have extremely good ideas what each other has.
It's not cheating. It's not collusion. It's a gut feeling. I fold more to Mrs Zombie while holding a "good" hand than I would against others, because if she were to check and I bet, and she reraised... yeah, I know she's got 75% of my starting hands beat. If she's re-popping from an early position, She's got AA-QQ, maybe AK. No way in hell I'm calling that, because it's not slowing down on any flop - and at best I'm hoping for a chop.
Sure, she's new but that isn't to say they haven't also discussed hundreds of hands of poker. That's all Mrs Zombie and I do following a game, and long before she took her first 2 cards. We sit and discuss "why would you have done" situations. It hones our games, but it also tells us exactly how the other one plays.
Could they have colluded? Sure. But in a collusion scenario, I think it would have been more prudent for him to just chip-dump to her, pricing in other possible callers to give her a massive chip lead.
I just hate it when players are suspect just because they are married/living together. Sure, you keep an eye open, but it's nearly impossible to tell a read vs actual collusion when the players share a life together.
In the end, you're best off not playing online.