I do NOT know your sitch...I concede that up front...
And I assume you have some fantastic unusual (rare) reason for wanting to share with your family members--what happened at a retreat for married couples in crisis... but I doubt it's a good enough reason.
What's the real goal? Are you trying to say "all is well now"? Did you feel guilty and want to know you've been forgiven now? I mean, WHY TELL them? Just show them.
And I can't see how it does not break their rules or how it would help your h feel safe in sharing openly with you...
just a thought. I don't know your sitch but I went to Retrovaille and have shared HERE, some of the things I've learned and one big breakthrough we had...but I shared MUCH less than that with my family and zero with his...other than "it helped us"...I let HIM talk to his family IF he wants to...but I find most men don't.
just mho
M: 57 H: 60 M: 35 yrs S30,D28,D19 H off to Alaska 2006 Recon 7/07- 8/08 *2016* X = "ALASKA 2.0" GROUND HOG DAY I File D 10/16 OW DIV 2/26/2018 X marries OW 5/2016