I don't think it was necessarily a bad idea, but given how far gone she is right now, I don't think it will help.
Even if OM let her go, she'd find someone else to punish you (and herself) with.
Me: 44, Wife: 39 M: 17 years T: 20 years Bomb on 08/25/09 1/13/10: MC started 1/28/10, 2/8/10: More bombs 8/28/10: Wife moved out No talk of D, no movement