@My instant death Making babies with a bad woman is a bad idea. Making babies with two bad women is an even worse idea. Making babies with two bad women in the middle of the apocalypse is an insane idea.
There are also lots of other reasons why this is an insane idea, such as the division in your group that would be created, feeding, housing, and controlling movement of two unnecessary and untrustworthy people in an enclosed enviroment, the distinct possibility of sudden betrayal, etc...
Every single MC in every manhwa has one basic trait that you and those like you will never have and that is self-discipline.