Maa baap ki ziyaarat karna

Q: Mere waalid ki wafaat ho gai. Walida bohot zaeef he aur khawind maa se milne nahi deta. 6 mahine se maa ki shakal nahi dekhi. Mere khawind saath bhi nahi rehta. Doosre sheher me apni maa or behno ke paas rehta he. Me apne do chote bacho ke sath akeli rehti hun aur me pregnant bhi hu. Mere sath bohot zulm or na insaafi hoti he.

Touching one's mother with lust

Q:

1. I know that if someone touches his mother with lust, it will break his parents marriage. I want to know if it is permissible for his (the one who touched his mother with lust) children/grandchildren to marry his brother's/sister's children/grandchildren? Are their children/grandchildren allowed to marry each other?

2. Can he (the one who touched his mother with lust) marry his mother's brother's daughter?

3. If the thought comes to mind that a perosn touched his mother with lust during his childhood, but he is in doubt whether he touched or not. What should he do now?