mysterious silence

Date: 1/29/2017

i am sitting with two ladies the are talking abt a girls character she looks very innocent bt she is cunning ....even i know a whole abt her i kept my mouth shut ,i kept my face like i am emotionless and listening... I saw one of my collegue looking at me ..staring me (like say somthing ) even my full attention was on my collegue , then she defined my silence as very mysterious