I think somehow the OW H needs to be told. I am sure he has an idea that something is up, all he probably needs is a brief call saying his wife is having an affair with your husband. it does not have to be you that makes the call. if u choose to call, black your number from appearing on caller id. then, your husband has no proof that you made the call.
me: 31 H:29 Son:5 m:8 years in november t:10 years first bomb: 10/06 moved home: 3/08 out again 5/08 ow bomb: 4/08, since summer 06 d filed:6/08, on hold 6/08 moved home:3/09 out again 5/09