You are right~~ There is a misrepresentation e from this goof extract and not clear. her in this instance refers to Xiao Youxue 's father and brothers since she was the doing the recall xD. Not Dingzi's , since she isn't related.
As for the fish scale armor, it wasn't too clear. Xiao Youxue had three months to make it into a suit. Since it very durable, she doesn't have much modifications to do anyway~