I can see why it would be really easy to get confused but yes the baby is yours as they will add the extra 2 weeks to the due date =)
i agree with the above, it always says 2 weeks more than what it actually is to allow for the menstral cycle ect, it will be your baby congratulation well done daddy :) x
No the baby will be yours it is just the way they do they dating, if she has been told bub is 7 wks, the actual baby is 5 wks old. This can be confusing, but they date from the first day of your last period, so thats 2 weeks before bub is concieved, be happy its yours :)