Congrats on being a newlywed! I am not going to pretend I can speak for us married members here so I'm only going to tell you what works for me.
I got married at age 28 (I'm 40 now) and a couple of months after my wife and I got hitched, we bought our house. The house, while only 2 years old, needed almost a complete rebuild of the interior because the previous owners pets pretty well trashed the place. Anyway, I remember once grousing about how I had no time for my models and one day my wife snapped. She truly reminded me that I am married first and foremost. She loves my hobby and supports it 110% but the fact of the matter is that I had to stop living with my 12 year old mentality. Don't get me wrong! She loves my often child-llike mentality! LOL! But what she engrained in me was the fact that there is a time and place for everything. Heck if she see's I'm a lttle grumpy, she'll just about toss me downstairs while telling me to go work on a model in order to find tranquility again.
But that's my main point. My wife buys models for me from time to time and she's even given me some great video games for Christmas and whatnot. The BIG thing to learn (at least in my case only) was to know the appropriateness of each activity. Think of it from your wife's perspective. She might wonder why you married her just to ditch her for five hours while you're working on something.
I don't know if this'll help or not but sometimes when my wife wants to (for example) work on the laptop for a while, while she's doing that, I'll bring a small kit upstairs so I can work on the simpler assemblies. That way, even if we're doing two separate activities, we're both still together and we can still talk. As long as I clean up afterwards, life is good. It's a give and take. Actually, I take that back. When you're both giving, that makes it a "give and give". You're both benefiting.
Good luck and best wishes! Just remember when it's time to be a man and when it's time to be a kid. Figure that out and you'll be alright. But don't give up one for the other.
Eric
PS. Get used to the "20 days if not more" to finish a model. And if you're planning on having kids, well, it was a good year if not more before I ever touched another model. I used to build maybe 12 a year. Now I'm happy if I can get 4 done in a year. But your priorities change. Now I focus more on quality and not how many I can crank out in 20 days.