He being a unreasonable.  He is trying not to have a kid / kids with you,  He already making it hard for you to start a family with you. The more the unreasonable request he's making the less chance he wants kids.  And it becomes your falt for not having kids. Ie not moving. And what's next request?

The only reason he moved in the first place was to be closer to his kids.   What are you going to buy a seven  bedroom house just in case. .  You need to talk 

Why are you arguing about something that hasn't happened and may never happen? Your SS might never want to stay once he's an adult and has his own life. Why do kids who don't even exist yet need a bigger garden? 

I've just read over your other post and would be in no hurry to get married to this guy - he's only interested in himself and his son and your post only backs my opinion up. 

I find this humorous because Daddy has no idea what kind of teenager his son will be.  He might want freedom from his old man.  Is he on track to go off to college? Is he being raised to fly the coop? Or is he being brainwashed by daddy to be a stoned basement dweller ?   You need to take a step back and take a hard look at how your SS is being raised.  Parents who can't imagine their kids growing up and becoming independent adults will cripple them into being failures to launch.  That might apply to your own future bios.  Can you buy out OH on the house or will you have to sell if this doesn't work out?  It sucks finding this out after buying the house but hopefully your paperwork on it is protective of your investment.   
 

IMO it's quite silly to expect a grown adult to still have visitation.  Head over to the adult forum to read the horror stories.  

It sounds like you're the one who is expected to make all the compromises in this relationship. I wouldn't move from a home I loved to accommodate a stepchild who was fast approaching adulthood.  I also wouldn't borrow trouble by fighting about a scenario that may never happen. 

However, reading your prior post, unless a lot has changed since then, I also wouldn't be rushing into marriage with this man (to the extent you can "rush" after 10 years).

First advice:   DO NOT MARRY HIM

if you are already having resentment and unease then getting married and having kids with him will make it worse.

Most step families have these bad dynamics and dear, they don't go away.

Your OH already showing you true colors.   When the tell you who they are BELIEVE THEM.

Today it's about an extra bedroom.   
 

You guys should be easily agreeing and getting along at this point and yet you are sacrificing your happiness.   This will suck the soul from you trust me I know the feeling.

My advice is rethink the relationship.    Definitely don't get married.    
 

Not even married yet and arguememts and resentment.     Red flag hitting you in the ass like a wet towel in a locker room.    SNAP.      

No! I just also read your other post and no, do not buy another house, and don't marry someone like this, he's bullying you. using your want for children to get what he wants. He's already preparing (two years ago!!!) for your SS to live with you when he's an adult! Your plan is reasonable, but not with him. I hope he's not on the deed! You really need to think your relationship through.

Living with you.?   Kids hit a certain age way below 25 they should be out on there own .  If he spends four years in college living on his own.  He not wanting to be staying with you. He will need a place for sleep overs ect. He would want his own olace

But back to question Number on. How much is DH on board on having baby's .  I know he saying it now. But does he really mean it.  The new baby's will displace SS.  Baby's need lots af care. Can't be careing for  baby with SS stuck up his ***   I really feel he putting up road blocks to not having more kids.  It's will be bedrooms now something else next until you are 50 and out of time 

Adult kids are not residents and they get space in a guest room, or stay at a near by hotel.

We had large homes for much of our marriage.  For a three person family.  6br for a number of years and 4br for a number of  years. All we really needed was 3 including a guest room.  We got great deals on those homes and were not looking for large homes.

Our current homes (we rent the one we live in) are both 2br.  Ours and a guest room for whoever may visit.  The guest room in each home is comfortable and nice, but purposfully small to make long stays decidedly uncomfortable. No personal space, limited storage/closet space, next to no floor space 

Your DH has time to extricate his head from his butt on this topic.  Stand your ground.  The little ones are resident, adults are guests. Even when they are spawn.

IMHO.

Your life does revolve around SS and no, it won't change.  It will likely get worse. I have been in the same situation and wish I could tell you things would turn around but......

I am in agreement with the other posters.  Everything seems to be about his kid and his kid seems to come before you and already before any future children.  I have been in a similar situation where my husband continually put his son first.  My concerns or comforts were always second, he refused to have children with me because he didn't want his son to have to be second, he refused to parent or set any boundaries or expectations for his son ever, and basically our entire marriage revolved around his son - even when his son was an adult (21).  I ended up leaving and divorcing him for many reasons, one big one being his manchild was not expected to launch.  His dad even told me on multiple occasions, "if he wants to live with us forever I'm fine with that as long as he's happy!"  There were many arguments.  I would get the silent treatment for DAYS if I said anything that even remotely suggested his son needed to launch.  

You have to do what's right for you.  I'm not telling you to leave - that's up to you.  However, I see the same red flags in your relationship that popped up early in my relationship that I chose to ignore because I thought (and my husband told me) I was being selfish.  I wasted 9 years of my time with this a&&hole and his worthless POS son. I had to pass on several great job offers as we couldn't move anywhere that manchild might not like.  Finding housing was challenging because my husband wanted a full, finished basement so his son "could just live there on his own and not be bothered by us."  I avoided finding any rental like that to try to avoid the permanent living situation, but in the end, I left because I couldn't take being second fiddle to his manchild and again, his son came first and there was no plan to launch.  My ex SS was also 12 when we met.  I had multiple red flags just like what you are experiencing and I ignored them.  Please re-examine your relationship and re-read all the poster's advice on here.

Please read this post and the other poster's advice and think long and hard about your current situation.  The one-sidedness will only get worse and who knows if your partner will ever make his son launch.