Do you want to stay married to him at all? If you don't and tthis is a dealbreaker for you (understandably so), contact an L so you can see what financial obligations he will have to you, then go ahead and file.
If you do want to stay married, then there are other things to do but contacting an L is still the best thing to do.
Check out 4Luv's thread because she is dealing with a child from OW as well but she wants to stay married.
me,34 exH,34 S,16 months S:3/31/09-left for OW started DBing 10/09 d final: sometime 10/10 current: http://www.divorcebusting.com/forums/ubbthreads.php?ubb=showflat&Number=2022856&page=1 met in 2004
