Is it really to late? Who knows....

[mahhhty]

I agree with your sister, I think instead of jumping to conclusions it is better to remain factual and grounded. With that in mind, have you ever asked him "What do you want from this marriage?" or perhaps "What do you think we can do to increase our happiness?"

Perhaps a vet would know a better generic question to ask. But something that is perhaps thought provoking without providing any pressure on him, and it seems like that kind of proactive question would be a 180 for you.