Nikaah & Marriage Issues

Hurmat-e-musaaharah

Q: I am a 19 year old male and currently studying Aalim course. A few years ago I had touched my mother with lust and I have finished reading the conditions through which hurmate-e-musaaharah will take place (i.e. if she had a cloth on which was thick and the heat of the body could be felt, etc). However I'm not so sure if the conditions took place or not because of it being a while ago however I have Ghaalib-e-Gumaan that the conditions took place. Is there any way out for me? Do I have to confess? Will Allah Ta'ala forgive me for this despicable sin even if I don't confess?

Committing zina

Q: If someone commits zina and then feels bad and wants to offer tauba and istighfaar with this hope that Allah Ta'ala will forgive him, but after tauba should he present himself before law authorities for Islamic punishment i.e sangsaar or not?

Marrying a person who has changed his gender

Q: I have been a resident in a foreign country for about 10 years. 2 years ago I met a woman who is completely feminine in nature. As time passed our relationship grew stronger. I wanted her to marry me and convert to Islam. She showed interest in doing so but the real problem is that she was born male by gender, and at the age of 21 she had her gender change operation and removed all the male sexual organs with female body parts. Now she is a women in all ways. There is no going back for her. She is supposed to be a women for the rest of her life. My question is, is there a possibility that a Muslim can still marry her given her circumstances , otherwise we know that to have gay/sexual relations with a man is a despicable sin. Please suggest me what to do.