My DH knew exactly what was going on with my cycle, and I had warned him a few days earlier that I'd had a temp dip, which I wasn't sure if it was implantation or AF coming early. So I got up in the morning, and randomly decided to do a test, monstly to kill some time and to confirm what I was sure would be a negative, when a cross appeared! So after being hysterical for about five minutes, I had a whole thirty second debate in my head as to whether to call him, or wait for him to come home, but in the end I called him at work and let him know! He came through the door with a big grin on his face. So I couldn't really have kept it a secret for long, but I'm planning more exiting ways to tell my parents!