I can only speak from my experience, but if you let her control the timeframe, she will continue to eat cake, what brought my W back was the realisation that she had thrown everything away and the also force OM into realising he was getting her full time.
I think if you delay she will just keep cake eating, do you what to be in a open marriage?
Me: 40 W: 36 T21 M17 S12 D10 D10 ILYBNILWY EA happened. PA happened. June 2016 trying to piece our M and life's back together...