I was thinking along the same lines as Hollye, Back in the day my mum thought if you went for a swim in the same pool as a boy you could get UTD.... So you could tell them that you went swimming and a mth later you were UTD....

OR


You could turn it around on them and say in a very shocked voice.... " What people still do that I didnt think anyone was still silly enough this day and age to have Accidents...

as for the sex just tell them you are hoping for a baby that looks like your DH as your not sure who the daddy is LOL that will get them talking.....

When I got PG with DD2 everyone knew that BHL HAD only wanted two.... So when we turned around and got UTD with her I got alot of so did you trick him questions.... or the most annoying one is BHL happy about it!!!! Grrrr it really annoyed me as we wanted this baby and we BOTH had decide to TTC her we just didnt think we had to tell everyone that we were TTC... I guess next time I will have to ring up everyone and tell the days we DTD just so they dont feel left out of our Private lives...