Summarized Fatawaa
• Is the father a Mahram(Non-marriageable) to his son`s mother-in-law?
The father is a non-Mahram(Marriageable) to his son`s mother-in-law, so it is impermissible for them to look at each other, or to have a seclusion(Khalwah).
• What is the ruling when the monthly period exceeds (15) days ?
Mostly, menses last (15) days, and more than that is Istihadah(bleeding outside the time of monthly period). Thus, a woman should perform Ghusl(ritual bath) to purify herself from menses, pray, and make ablution for every prayer when its time is due. She should also consider her regular menses in terms of time and duration. So, if she knows her regular periods, then she should count the days of bleeding during this period as menses, and after those days, she is considered as having Istihaadhah. For example, if her period extends from the 20th till the 27th of every month, then this is her menses, and whatever before or after that is Istihadah. Therefore, she is prevented from prayer and fast during her menses, but when it ends , she is at liberty to perform Ghusl and pray.
• I am a disabled woman who has vaginal discharges and can`t control her urine. Therefore, I combine prayers. Is that permissible?
All perfect praise be to Allah, The Lord of The Worlds, and may His peace and blessings be upon our Prophet Muhammad and upon all his family and companions.
According to the Hanbali doctrine, it is permissible for the sick to combine prayers. In your case(Asker), it is better that you delay the noon prayer until a few minutes before the afternoon prayer in order to minimize the time span between the two and perform each alone. In addition, you can do the same with sunset and evening prayers. Finally, we ask Allah to bless you with recovery. And Allah knows best.
• Is the marriage contract considered valid if concluded at home by the marriage official(Ma`zon)?
Yes, it is valid as long as it is registered at the court.