A Hysterectomy, I Presume

As teachers (or future teachers) you always know that it is not usually a good sign when a kid comes up to you and says "Guess What!?!" So one morning after the students came into the classroom one little boy comes up to be with great excitement and says "Guess What!?!" I replied with "What!?" the little boy begins to tell me, "my mom had surgery this weekend, but you don't want to know where" so I just said "OK, I hope she's feeling better?" (not really wanting to know where his mom had surgery at/on). So I turned around to go help another student and the little boy then yells "SHE IS! AND IT WAS ON HER UTERUS!!"