Nikaah & Marriage Issues

Q: Masturbating with the hand is forbidden, whether a person fears adultery or not. However, if adultery cannot be prevented except by it, he should give it precedence over it, committing the lesser of the two evils." 

Query 

Maliki say it is haram even in fear of zina but in necessity, do they say it is permissible or excused or do they say prefer it? What is the meaning of that... In necessity it will be still sin and haraam? Explain the latter statement, what they are saying from However if...two evils.

Q: 

1. If a man touches his maternal grandmother with lust, does the marriage of his mother with his father break? 

2. If a man touches his paternal uncle’s wife (Chacha’s wife) with lust, does his paternal uncle’s marriage break? 

I am dealing with a lot of thoughts about hurmat musahara.

Q: Is a secret nikaah in which there are witnesses and where immediate family have been notified acceptable under Hanafi rulings?

Q: After the child is born, what are the sunnats and aadaab that should be performed?

Q: I wanted to find out if I go to my father's house for holiday, is my husband still financially responsible for me during my stay there or is it my father's duty?

Q: The bride chose a musjid which has a ladies section and desires to be present for her nikkah. Is this allowed? 

Furthermore, does she have to choose the musjid closest to home or can she use a musjid 2.5km away?

Q: If a man divorces his wife with three talaqs and remarries her without hullah (intervening marriage), and a child is born from this marriage, will the lineage be established?

Q: 

1. What kind of illnesses would one have to disclose when seeking a wife? 

2. If the illness is not current, does it have to be disclosed i.e. if one used to have ocd/waswasa issues in the past and one has healed a great amount, would one have to inform a potential spouse of it in case it could creep up again? 

Q: Is this genuine that for nikaah, first the father and mother of the boy should go and see the bride followed by the sister/sisters and then the boy should go and see the girl for nikaah. This seems as the different rounds of selection.