Hurmat-e-Musaaharah

Q: If a brother touches his real sister with lust does it invalidate their parents' nikkah?

Q: If a person touches a woman with desire does her sister becomes haram for him?

Q: About fifteen to twenty years ago my brother touched my mother at chest near neckline. My mother being a very light sleeper woke up. I got to know about hurmat-e musaharat masala sometime ago. I'm not sure about his age. It may be 13 or below. My mother is absolutely sure that he didn't touch her with lust. But I'm having guman that may be my parents nikaah is broken. I'm very depressed.

Q: I usually get thoughts on hurmate mushahara, like when I shake my dads hand, I am scared and worried. I don't have lust but I get thoughts that suppose it is lust. My father in law is old, about 60 something and Aalim. Now he was lying down in the room and I was in the other room. It was open so I could see who was sleeping. Now I get these thoughts about lust. So my father in law was sleeping and I went to pray namaz. I was just looking at his private parts, it was not open, he had on kafni n izhaar so I couldnt see his private part and the room was kinda dark and I was a distance away. Now I didn't have any desire but I just get these thoughts about lust. I was just looking at the private part area but father in law had on his pants. So after I saw something like a penis, I was thinking that his private part was out when he was sleeping or was it a material. I saw not sure but my heart was thinking that it was not his penis showing. I just get these thoughts and I don't want them. I have no lust feeling for my father in law and I didn't look with lust. I just looked because I wanted to see if I get these thoughts. Is my nikaah valid or will hurmate mushahara apply? 

Q: If a daughter presses her father's feet below the knees solely with the intention of khidmat and the daughter nor the father feels or has any lustful thoughts before, during or after the act. They don't feel anything at all, then does hurmat-e-musaharat take place? (The daughter is married)

Q: What remedial measures does one have to take if the son-in-law has been advancing and inviting his mother-in-law for sexual pleasures. He also reveals this to his wife that he is thinking of her mother during family life in bed. Is the marriage alive? The discord of his wife became unbearable and brought the subject to me (paternal uncle) and another cousin of hers. Both, the wife and her mother (my sister-in-law) have come with this complaint. And I am disturbed and helpless. I referred to Suraah No 58 first 5 verses and found it be a very admonishing sin and after hearing from another brother in Islam (source). Is it almost one talaq? Is the marriage still alive? The girl, my niece, does not want to live with this man any further. She is seeking separation (Khula). Keeping in mind her father's financial constraints and health and for the livelihood future of hers and her young age (sinners wife) children's future, we want the marriage to be kept alive. Please help with appropriate reply. 

Q: Is it permissible for a daughter to kiss her father on the hand and is it permissible for a father to kiss his daughter on her hand or forehead?

Q: I need a fatwa if a marriage can be saved after finding out that a father in law had a relationship, fling with his daughter in law. No sexual intercourse happened. The father in law made maaf and they repented. The father in law is late...

Q: Years ago a father raped his daughter repeatedly. Did his nikkah end with his wife who is the mother of the daughter?