It takes as much work to UNDO a marriage as it does to REBUILD a marriage. Ending a marriage isn't any less work.
Your wife has work to do either way, she's not escaping anything.. the paperwork, the negotiating, the schedules, dividing up assets, finding new residence to live, MOVING... its a LOT of WORK
She can AVOID all of that by ending the affair and commiting to a reconcilliation plan with a FT...
fit that in there someplace
I woudl definitely make HER do the WORK of moving OUT if she refuses to end her affair..
Let her know she can avoid the WORK of moving OUT if she ENDS the AFFAIR