I had this problem PL - well I still do but most people who come here know I am TTC now. I have a box with a lid in the bathroom with preseed, cough medicine (for the cervical mucus!), pee sticks, etc.
Luckily my mum knows and she never comes round.
I did however leave those flipping disposable instead cup things on the stairs for my DH's brother to see
Beanieb CD11 cycle 24 TTC#1 (mmc June 2009)
ClaireDeLoon CD13 cycle 25 TTC#1 (mc Sept 07)
blackrock CD15 cycle 29 TTC#2
PistachioLemon CD19 cycle 9 TTC#1
ButterflEi CD21 cycle 23 TTC#2 (cp april 08, june 08, April 09)
Jaamy CD29 cycle 25 TTC#3 (mc Mar 08 and Sept 08)
Glastochick CD42 cycle 25 TTC #1
ShayeraHol CD46 cycle 21 TTC#1
JamieJay CD48 cycle 6 TTC#1 (mc June 2009)
louisbackagain TTC#1
BFP's (but not ready to graduate yet)
Zen1980 BFP 10th May 2009 cycle2 (after MMC Jan 09) cycle7 before that.
stillstanding BFP 12th June cycle13 TTC2
TTC GRADUATE LIST (we WILL be on it)
Moonlit BFP 17th September (CD33 cycle21 TTC#2)
Leaky BFP 2nd Oct (CD35 cycle2 TTC#3)
Saz007 (due May 2009)
Migola BFP 19th Nov (CD? cycle8 TTC#2 CP Aug 08)
Babybump2b BFP 30th Nov
VJay BFP 22nd Dec (mc June08 & Oct08)
theboob BFP
mummy2t BFP
herethereandeverywhere BFP 25th Jan
Comma2 BFP 24th Feb (CD30 cycle5
Kyte BFP 11th March
Sparkly (BFP 20th Feb) EDD 30th October
MollieMooma (BFP 6th Apr) EDD 16th December