Oh look at that! Sherry turned out to be the same weak bitch as the other girls from other mangas where they IN NO WAY CAN say NO THANK YOU FUCK OFF to the guy that is trying to blackmail them into doing what they want and what is more using her sick mother to get her to say yes? ORIGINAL!!!!! monotonously "never have I seen this kind of blackmail before"
You know sherry, you can also do as he says but telling MC about it as well. That way MC can help you by putting up an act and that way the debt gets cleared and you dont suffer from moral values and stuff....but nooooo she is going to say "it's the only way, I cant do anything about it, there is nothing I can do, I did kill my comrade, etc,etc,etc" and she will do as the guy says just to end in MC showing how OP he is and forgiving her for what she did in which case she will feel even more horrible than before since MC is such a great man that she doesn't deserve his forgiveness and bla bla bla....