Since you saw those papers I would keep doing what you are doing but also keep in mind what also may be going on. She may be a conflict avoider and is doing alot of the work behind the scenes to not rock the boat until she has to.
Just make sure you are protected financially and with your kids.
Remember its only a piece of paper.
Me: 46 FWS: 36 Married and Divorced 4/07, Pregnant 7/07,False R 7/07 Baby Girl born 3/08 Kicked him out because OW: 7/08 5/10 He realized what he had and lost. Moved home! REMARRIED 3/14/11!!