I don't think one of them "checked with" the other. I think what happened was, his wife asked him if he'd be willing to separate instead of divorce, and what he thought of that. He then said he'd be willing to do that under 3 conditions, one of which was the "no dating while we're still married" one. His wife immediately agreed to the other two, but objected strenuously to this one.
To be honest, from the way he describes it, she's already got a date lined up for as early as THIS weekend. Woman didn't waste much time, and they, in fact, haven't agreed to ANYTHING yet, and remain married and living together.
