Why don't you do some research and make a few calls to some AA groups or look online for some support groups that can maybe answer those questions for you about R with an A that is less than a year sober.
Seems like if he is doing well and is handling it well you are ok. My only concern would be if you were the only one bending jus to keep the peace and go back to that codie behavior we all know well I am learning that the codie behavior is almost as powerful as the addiction itself.
Me: 46 FWS: 36 Married and Divorced 4/07, Pregnant 7/07,False R 7/07 Baby Girl born 3/08 Kicked him out because OW: 7/08 5/10 He realized what he had and lost. Moved home! REMARRIED 3/14/11!!