Marrying a girl after committing zina with her mother
Q: I have committed zina with my fiancé's mother mistakenly. She is my mother’s sister and I repent to Allah and ask forgiveness for my mistake. Nobody knows about this except ﷲ and us . I’m very nervous that if I do nikah with her daughter then the nikah will be valid or not and if I have children with her daughter.
I don’t understand what to do and currently it’s highly impossible to step back for marrying her daughter because if I try to step back there will be a big problem. Please bring out a solution for me. I love my fiancé very much and I can’t leave her.