SG, you need to understand your wife is stubborn right now. She is giong to try to PUSH you away to make HERSELF feel less guilty. SHe will do this by saying nasty things to hurt you like "we are done", "it's over", "I love you but i'm not in love wiht you" etc...
I would just reply with :
"And OM's meddling has nothing to do wtih any of htat right?"
And walk away, don't wait for a response... just walk away... and say it CALMNLY liek you don't buy it for a second... not smirky, but calmnly with confidence.
You need to understand she DOES feel some level of guilt, she is goint to thrash about to deal iwth it... she will make excuses and threaten and cry and yell...
Just keep the pressure on her without losing control...
If she takls about the divorce again you can also point out :
"This is OUR decision, NOT Just yours, and certainly NOT HIS..." and walk away...