POV: 10 years of marriage

You are married for 10 years and living a happy life, but suddenly your husband brings in a child about 9 years old, and asks for your forgiveness. By the child’s age m he’s been cheating for more than 8 years, the mother is dead due to illness, so nobody is left to take care of the child.
What did you do?
1) blame the child and kick them out
2) divorce the husband and leave the child be with that drunkard
3) keep the child and forgive the husband
4)force the husband but treat the child horribly
5) (insert your actions)

I was curious who a normal person would blame for this or not at all