How would First Milk Cookie react to if she saw what Shadow Milk Cookie became?
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If she regained her memory of him,(Which she already possibly did since its hinted in one of her quotes)I think she would be completely devastated and horrified by both how Shadow Milk Cookie turned out and and all the things he done.Since her biggest fear is not being there to save people,she would fall into despair and blame herself for not being there for him and that she wasnt there to help or save people that her creation/son has hurt and possibly killed.She probably saw Fount of Knowledge as a sweet innocent little angel who wanted to help others but he was probably already unstable before his corruption.If she will meet him,it will be very hard for her to get him back considering even Pure Vanilla Cookie is struggling to get to him and Shadow Milk Cookie made it clear that he is aware what he is doing and he doesnt care and chooses to be a monster who revels in causing others pain and suffering and spreading chaos with little to no remorse.I feel bad for her.