She's right about one thing: your old marriage is dead.
Once your wife throws off the shackles of marriage, will she be OK with you sleeping with another woman? Is she OK with the possibility that you will fall in love with someone else? She wants to be free -- is she OK with you being free as well?
Me: 50, MLC/WW 45 Young kids Nov 2015: BD1 Apr 2016: BD2 Jan 2017: W filed Feb 2017: D final