I don't think 3 days is enough to see everything (particularly if it your first trip and you don't know your way around). You can easily spend a full day at each of the parks, and you will be surprised how exhausting it can be. I took my 9 year old niece, and we spent our first day at the Magic Kingdom. We went in August, so the park hours were longer than you may find them in Nov or Dec and we were there when the park opened and stayed until closing (we did not do e-nights). The next day we went to Epcot and again spent all day. The crowds were light, so we did not spend much time at all waiting in lines, and we did not spend time at lengthy sit down meals, but we were busy the entire time. By day three, we had to take a break, we were just worn out, so we spent that day at our resort's pool, and also took the Disney bus (and boat) to some of the other resorts to look around, and rode the monorail. We then spent our 4th entire day at MGM and our fifth at AK. We went back to MK on day 6 (we really had seen/done everything there on day 1, but she wanted to go there again). Day 7 was also our getaway day, so we spent part of the morning at Blizzard Beach, but had to leave to get checked out of resort. We spent the rest of the day at the resort pool before leaving for the airport. We had a great time, but we were on the go the whole time, and there were things we just didn't get a chance to do (spend some time at Downtown Disney, see the Electrical Water Pageant, go by Fort Wilderness, spend more time at the resort pool).
If you do only have 3 days, read up in the guidebooks on the best strategy to see the parks. Also, search these boards for tips and other's trip reports. If it were me, I would decide ahead of time which park NOT to go to....splitting your day in two parks is okay if you have some extra days, but it takes some time to get from one park to another, and you will already be pressed for time, so I would spend a full day at each of the three parks I chose. And keep in mind, you will be worn out....you'll need a vacation when you get home. Try to talk your husband into expanding your trip beyond three days.