Agree with biggerlonger....... teeheheee!
Seroulsy, really not worth the agro, you have a huge massive wonderful thing about to happen, focus on that, you dont need the stress that telling his partner will bring. Really not wroth it. Also, you may get blamed for splitting them up, bler, bler, bler.
Dont do it sweets, stay the out of it, its the best way!
Good luck with your little one, hope the birth goes well and you guys bond quickly! Also hope you and your partner managed to sort everything.
Good luck, and get as much sleep as you can! You'll miss it, i know i do!!!! :)
xxx