I agree I don't think you will ever get closure. Closure will come if she files for D and even then she may not admit anything. My STBX still did not admit she went away with OM for a weekend. I don't give a darn anymore if she did or did not even though I have proof she did.
Closure will only come from you healing over time.
H-46 XW-38 T-7 M-6 S-9,8,8,6,4 S 11/30/15, I filed 12/8/15 EA 2/1/16 D dismissed 3/24/16 PA 3/18/16 confirmed 4/22/16 XW files for D 4/1/16 - D final 11/17/16 Finally moving forward...