Big Boy to MAN TalK????????????

My Man and I have lived together for 4 years, next month. He talks alot of marraige and kids. I am skeptical, very skeptical. Because.... when him and his cousin are together they talk about traveling the world. His cousin is a stark raving mesogenous, living and breathing the ideologies of talk show hosts and book authors that write about how to and how to keep being male hoes to increase the number of women flaunting at their feet. His cousin is also serverely overwieght and my man is the strong attractive guy his cousin wishes to be in order to use women. My man admits often that his cousin is emotionally damaged from childhood. His cousin doesn't think we should be together but it's 4 years since. I know my man has fantasies of traveling with his cousin and friends and having a great college boy time (he never went to college). I speculate he feels that he could go someplace and hang out for a week, meeting fine gals partying and then on the spot the revealation will come to him that either he should be a family man while I can have a family or wait until he's 60 and that's too late for me. I don't think it goes threw his mind quite like that, but that's my simplification. I think it's totally DUMB! Of course you will like the fast lane once you've been dreaming about it for 10-12 years since puberty and once experiencing it- will that be the last time- come on now, really? I've done my thing like that already (cancun, spring break, miami, jamaica). My mom says not to worry beause we will never have that much money for him to just squarder- basically telling me to make sure all the other priorities are paid off or done first. He has goals of owning property, becoming a stock investor (he sells cancer insurance), being a political role model, taking care of our parents, moving my family closer to us and having kids. We're 28 and he wants 6 kids, barely making it in a nation going twords a depression, where we both want to be part of that change. My mom said that in the process of accomplishing those goals- the fantasies will either be lost to cirstance or he will travel in blatant selfshiness in betrayal of all these goals. So she said not to worry and try hard for what we want and leave him alone to comfront reality instead of giving him the ultimatum "me forever or bachlor life." I am anxious for a direct answer. I don't want to spend another 5 years working on an "US" to be destroyed by "Oh, I'm off now to get friendly with the natives and act savage because I my cousin and I planned it since we were 12." Should I have the big boy talk -"you need to pick a lifestyle now." or should I just leave him on the path he's on with the "cloud 9" of boy'z vacation lingering somewhere.???????????? I feel like he's trying to prune himself for a family (he'd be a great dad and husband otherwise) but he's also attracted to these other ideas too. Does that attraction matter, or is it like my mom says - everyone has fantasies, so what- everyone makes decisions based on real life too (if your sane)? Just wanted other's opinions. Thanks