You never know how it's going to go. Some women want nothing to do with riding in your plane after they have children. Others will only go if the kids can go too since they don't want them left without parents if something bad happens.
My planes got progressively bigger as our 3 kids grew. When they would no longer fit 3 accross in the Lake Amphib we got a 6 seat C-180. We were making trips at least every other year from our home in Alaska to the lower 48. The C-180 was only good for a couple of trips before the 3 girls and their mother outgrew it. Then came the C-206. Great airplane, I kept it 18 years. But, after the first trip the girls became teenagers and no longer wanted to be seen with mom and dad.
None of the girls showed any interest in aviation during this time. It was not until the middle one turned 19 and announced she was going to fly jets. Mom and I couldn't figure out where that came from and thought it was a passing fantasy. Today, at 36, she flys MD-11's for FedEx.
Probably no matter what you buy, you'll wish you bought something else. If you are to have any hope of making flying a family affair, you will at least need access to a 4 place. But, most of your flying will probably be with only the front seats filled. Until you know a little better how this will play out for you, you might want to consider a club. Or, as was suggested, buy a CT but be in a partnership or club where you have access to larger planes.
John Horn CFII
2007 CTSW
Light Sport Repairman - Maintenance Rated
Rotax Service, Maint, & Heavy Maint. Certified
Independence Airpark, Oregon