I addressed that his behavior changes seem because of her,and he denied. I don't think i asked him if he's in abusive relationship,though and if i did i forgot. The only thing to really do is detach and pray. That is true,eventually he will open up. They are sexually monogamus,at least now. When he met her,he was technically married and well,spending a lot of time being with his wife and still considered with her if you know what i mean,i'm sure sexually and spending time,etc,etc but he was actually cheating on her with several other women throughout and met this girl he is seeing now that way. I don't know what kind of girl would keep seeing a guy knowing he is still married and cheated several times. I personally find that very odd. I'm one of those people who is all for exceptions to the rule,and that love comes when it comes and it's not always convenient but this,to me is not that kind of exception. I find the whole arrangement to very odd. On one hand,they seem like they both could be ok with a polyamourous relationship but then on other,they seem extremely co-dependent and she does get jealous and insecure and is very sexually possessive. Honestly,in my opinion,it's a mess. I'm starting to think maybe it isn't an abusive relationship however,theres definitely some odd things going on that are unhealthy.