Hence why I originally added it to the pool, "You're the last person I want to hear that from", but someone else didn't agree with me. ¯\_(ツ)_/¯
That's because that pool is for things like Hitler calling someone a nazi or Yuyuko calling someone a glutton, not for things characters literally don't want to hear.
As for Sagume, seeing the other picture with her and Sumireko i think she's just being really mean.