What will happen after you get married on Harvest Moon More Friends of Mineral Town?

Answer 1

After you get married, you have to go to bed, then the next day when your character wakes up, a special type of marriage happens, but then you start year 2 and so forth. You will also get a baby which is a boy, sorry - no girl - but I can't say why you don't get a girl baby.
In the second year, there will be two years and so forth. The last couple of years will only be single years which I really don't know the reason. There is a very sad ending and it has to do with your character.
You still can grow crops, raise cows, feed chickens and so forth just like in the year on. You will also notice new tools that you can get from your neighbors once you become friends with them.

Answer 2

It'll go into year 2 and so forth until later in the game something tragic happens to your character. I won't say what because it will spoil the ending for you. Also, the game will go into a few years beyone year 2.