No. Your child will never grow any older than a teenager and he will not ever marry anyone.
You can not have a child with Kai in Harvest Moon DS. But I'm guessing you're talking about Harvest Moon DS Cute, and yes you can have a child after you marry him.
There is no day you have to get married. In Harvest Moon DS you can get married whenever you want.
on the beach
you need to have a kid
Yes . You have to have that many to get married .
No
No.
A year after you get married with the blue feather.
Nina will die after you are married and you have a child.
No. Harvest Moon DS is for the DS only. There are other Harvest Moon games for the Wii.
No. You can only have one child.
You can't. Once you upgrade your house and get the big bed, the small bed will still be there no matter what. its for when you have your kid, and your kid will sleep on the big bed with your wife (or your husband for Harvest Moon Ds Cute) which I think is really weird cuz you should be sleeping with who you married, and your kid in the separate bed. but yeah, you can't get rid of it, its YOUR bed forever