If she wants a divorce, let her do it. I have found that my W was out the door, drafting papers with L etc. That was back in Feb, I have not seen anything since. They talk the talk but most will procrastinate about getting things done.
It is a long process, leave it to her to worry about.
They are both "smitten" at the moment, but do you honestly think that after the "honeymoon" period wears off, that they will still feel the same way (considering the age difference.
I don't know of too many guys in their early 20's that would want to committ with someone so much older than themselves, with baggage. The longer the talks go about a permanent "future" together, the more either of them will get cold feet.
It is the "feeling" that is keeping your W with him. That "feeling" will not keep them together, as it will lessen, then they will have to rely on something else to keep the R going. I don't know of too many things they would have in common to continue their R (due to the age difference). So eventually one of them will feel stale and move on.
Andyv
AndyV M38 W36 D7 M 13 years Together 17 years W wants D mid Dec 06 (ring off) W wants separation early Jan 07 (she backdated to Oct 06) EA revealed end March 07 (Nov 06 W first meeting with OM) Hallmark moment "I care for you but am no longer in love with you."