Girls.. Maybe you could try my strategy... I always tell my Mum that my BT is a few days later than it is so I'm not fielding any questions on that day but my lying is more so that I have time to personally drive to my Mum and Dad's place to give them the good news when it happens.. I had to ring my Mum today and tell her that AF arrived this morning and she was so sad for me that it broke my heart to have to tell her... Everyone at my work knows what i'm up to and when I broke down in tears this morning they respect the fact that I left work and why.. i just couldn't hide this.. I'm superbad at it.. Good luck ladies...