I'm sorry you are going thru this. Your W is very, very hurt and confused. This is SO obvious in the email. Her inner turmoil must be as great as yours is. She is being pulled in different directions, and she doesn't really know what she wants (she thinks she does). What is also obvious, is that the OM has a low self esteem - and she is battling with this because she doesn't want to hurt him (he has been burned badly in the past). This seems to be a common thing for the walk-aways who are involved with an OP. Almost inevitably, the OP has had a bad R that they have been hurt very badly in. In my first separation, it took WAW about 3-4 months to break it off w/ OM because she was afraid of hurting him like he had been hurt in the past.
As far as the financial....only YOU can make that decision. Personally, I would stop bailing her out of everything. She has made the decision to leave. She should also have to live with the consequences. It's equivalent to a teenager running away from home, but asking for money to do so ahead of time.
As always, these are just my thoughts. YOU must do what you feel the need to do. May God bless you and your wife in this very difficult and confusing time, my friend.
Bryan
Jeremiah 29:11 For I know the plans I have for you," declares the LORD, "plans to prosper you and not to harm you, plans to give you hope and a future.