Paternity

I am considering starting a paternity action but am not sure if I should. My daughter is six, has always lived with me, and I have always provided for her. I am not interested in support only concerned there is nothing legally established. Doing such would make her dad upset and I am sure he would fight it to some extent. I love the arrangement now is there any major benefits to having legal full custody?

my son is 20 and had a baby with his then girlfriend and she is 17. The girl and baby live with her mother but my son pays for half of the babys daycare and we have him 2-3 days per week. The babys mother really does not do much with the baby her mother does everything and tries to fight us on seeing him. can my son get custody of the baby to stop all the hostility. The babys mom is just stuck in the middle because if she lets us do things against her mom she gets it from her at home. The baby has my sons last name and he is on the birth certificate and signed all the paternity papers in the hsopital

My husband, after a DNA test, found out that he has a 36 year old daughter - this was pursued by her. What are his legal responsibilities towards her in the state of Louisiana, although we are moving to Texas in the next couple of months.

My daughter and her boyfriend cotenant an apt. they have a child together, the BF has decided he dosn't want to be in the relationship any longer and has moved out to his parents home but he refuses to pay his portion of the rent or even have his name removed from the lease unless my Daughter agrees to sign a piece of paper with some demands he wants. until she does he won't give the apt key back and is coming and going as he pleases. what rights does she have to prevent him from doing this?

I need to subpeana my father for his DNA how will I do this ?