Marrying a girl who committed zina

Q: I want to know a fatwa on zina. If a girl do zina once in her life before engagement with someone else and seeks forgiveness from Allah and after sometime she got engaged with a person who did not do zina in his entire life and the girl tells her fiance that she did zina mistakenly. Now she seeks forgiveness since she did this sin. What is the order of shariah about this? Is the nikah halal or haram with that girl?

Being forced to attend a khatam

Q: My family has a katham every year, the changing of the flags. I know it's not as per the Prophet (sallallahu alaihi wasallam) teachings, and it's innovation. But I'm forced to do it, as I will get shouted at.

Please advise, am I sinning if I do the katham? I tried to refuse previously and I got swearing. They don't understand it's not as per the sunnah and I'm living under their roof. So I'm basically forced to do it. What do I do?

Divorcing one's wife for insulting one's mother

Q: My wife insulted my mother for jealousy over my second wife. My second wife used to live with my mother. Initially my wife who lives with my mother phoned my other wife through my mother's phone and insulted her, as a result she called back to my mother's phone and insulted my mother badly. She used disgusting words when she was insulting my beloved mother.

What should be my reaction to this, shall I divorce her or not? Please advice me on this matter.

Hurmat-e-mussaharah

Q: If I touched my mom with lust and hurmat-e-musaahara occurred, now I repented a lot and promise to Allah that I will never do it again.

1. Is my mom still a mahram for me, and do we still have the relationship of "son and mom" ?

2. Do I still have the relationship of "father and son" with my father?

Esaal-e-thawaab

Q: I have a question regarding esaal-e-thawab. When we do a normal act but for the sake of Allah we get rewarded. For example, if we eat with the intention of being able to fast the next day, then we are rewarded for this intention even though eating is not an 'ibaadah in itself.

My question is: can we donate this kind of reward to the deceased (even though it does not come from a direct form of 'ibaadah) or is it only reward from direct types of worship (praying, fasting, etc.) that can be rewarded?