I apologise, Kate, for getting a bit off track from your OP but I guess I sort of wanted to get another option out there for you where both you and your DH could benefit from a not so pleasant situation, if you can understand where I'm coming from...

I think you won't know 100% who the bubs is but I would imagine there would be a big chance that it is your DH given your ovulation and BD dates.

Gracious Goddness, Thankyou for pulling me back into line.