Nikaah & Marriage Issues

Mother preventing child from getting married

Q: My question is in regards to my obligations to my parents. I am 26 years old and I have always respected my parents, loved them and still do. I am ready for marriage but my mother keeps putting obstacles on my way and she doesn’t want me to get married. She already said yes to a proposal with lots of hardships. She always says you’re going to have bad luck, you’re going to cry once you get married, you need to take care of your parents (although I have other sisters and brothers). She also doesn’t understand that one day her daughter will get married or at least she will have the right to get married but she always refuses and says everyone has taken care of their parents instead of marriage, why can’t you, please guide me what to do?

Having a tea invitation before the nikaah for those who cannot attend

Q: What is the status of what has now become a norm where a girl who is making nikaah holds a tea invitation a few days/week before her nikaah. They say that they do it as their numbers for walimah are limited and thus cannot invite everyone they'd like to like neighbour's, friends, etc.

Is this allowed? What should one do if one is invited to such a tea? It's a simple tea where they serve savouries etc., no intermingling, however it is done for the above mentioned reason.

A wifes primary duty is her husband and children

Q: I am currently taking care of my parents who live in the unit next to me in a complex. My father wants me to buy a house so that I can accommodate the two of them (parents want to buy the house for me) but they do not want my husband to stay with us (they can't get along) and don't want my married children or grandchildren to visit on a regular basis. I cannot live without my husband and children. My parents want me exclusively to take care of them.

I'm the daughter and I have 3 brothers who don't want to take care of them because of previous issues with their wives. I do not mind living the way I'm living in a rented place because I have my own space and they have their own space.

Am I suppose to be listening to my parents or does my own family (husband) take priority. What is the Islamic view? 

Child remaining in the womb of the mother for more than 9 months

Q: In Behishti zewar theres one masala that states that if a husband passes away and then after a year the lady gives birth to a child, it will be attributed to him (she didnt get married again at all after his passing). Conception happens a few days as afterwards the nutfah dies and conception is only 9 to 10 months.

Is it normal for a mother to carry an offspring for 12 months?