touching with lust

Q: For hurmat musaaharat to be established, is it necessary that shahwah be felt at the exact time of touching. Now suppose a man touches a female. He did not intend to touch her with desire. But their hands were together for a few times. At this time the man felt lust. That mans, shahwah was not present at the beginning of the touching, but it came when the hands were in contact of each other. Does it establish hurmat musahara?

Q:

1. If a man’s hand accidentally touches the hand of a female and any of them feels lust, does it establish hurmat musarrat even though the touching was accidental?

2. If a man or woman is not sure about their feelings at the time of physical contact that whether they felt any desire or not, does hurmat musarrat establish?

Q:

1. I wanted to ask, if while touching the opposite sex, a man or women ejaculates, then does it establish hurmat musarrat?

2. Does lust in the case of women indicate the movement of vagina?

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

Q: I have a question regarding the validity of my friends nikah. My friends uncle touched my friend with lust when she was almost 10 or 12 years old. Afterwards he didnt do such things with her. At the time of nikah, my freind chose her uncle as the wali or as we say, the wakeel of the nikah from her side. Now she has four children and she is worried if her nikah is valid or not.

Q: I have a question with regards to hurmut mussaharah. Unfortunately, I was watching porn/masturbating one evening, where suddenly my mother entered the room. Although I did not expose myself in anyway, I was greeted and touched whilst I was still in an excited state from the haram I did. I remember feeling something inappropriate and trying my best to suppress the feeling, although I have no such feelings at all normally (sorry for going into detail, but I remember I still had an erection before they entered and there was a feeling after the touch which was out of my control). I also remember warmth from the touch. Has hurmut mussaharah taken place? Please advise me what to do.

Q: I lost my mind and shaitan makes my eyes blind. I had touched my sister sexually when she was sleeping. I think that kafara is the best way to avoid shame. 

Q: If a ladies brother in-law has touched her without her consent with desire what will be the state of her nikaah?

Q: If a brother touches his real married sister with lust, does it effect it her relationship with her husband and what about the relation between brother and sister?