OOPS! INSENSITIVE BLUNDER

Yesterday the Annual General Meeting Parent-Teacher Association was held in my school.  As usual I was busy taking pictures and when I came to a group who were having a chat with my colleague Amlina (the one on the right), I called out to my student Shahdan to ask his mum and dad to face the camera so that I could get a better shot. 
Then my colleague reminded me that Shahdan's mum passed away a month ago and the two other ladies with him and his dad were his elder sisters.  Oh! My goodness, how forgetful of me.  I wanted to kick myself for being so absent-minded.