Just because Fran and Peter are 'Happily Divorced' (Wed., 10:30PM ET on TV Land), doesn't mean they're ready to move on with their lives. Peter hasn't even moved out of the house yet. But this week, when Peter was on the cusp of a huge sale that would have allowed him to not only move out but leave the state, they finally faced the prospect of separating.
Fran panicked, and apparently started sabotaging Peter's chances of making the sale by convincing him the octogenarian client wasn't interested in a house at all. He was only interested in Peter.
She even slipped into the opera the two were at to try and "save" Peter from being physically assaulted by the man. In all honesty, if we'd seen what they saw we'd have probably jumped to the same conclusion they did in that moment.