I tried to google translate it but we all know how google fails. XD It said something like she or something testified to having the baby (possibly her friend, like Tenshi said) and that the wedding was a shotgun wedding. xD
I think this is just the media stirring up trouble based on such little evidence as 'hiding her stomach' to big up and cash in on the wedding news, like Koumori said. You know how Japanese media LOVES to make-up random **** and attack stars, wedding news and the like is like a field say for the morons. >[ They have absolutely no proof, all they saw was her hiding her belly and went OMG WTFBBQ WE COULD TOTALLY SAY SHES PREGGARS. 8D Like they do. XD I mean, they've already gotten the details wrong, saying she got 'speedily married after 4 months', when she announced she was seeing someone in March. And I highly doubt it was anyone else she was talking about. They cannot do maths, apparently.
One of Koda's representatives in Avex already confirmed she is not pregnant. She may have got tested at some point, but they have said she is not pregnant, so I wouldn't believe it til it comes from kuu.
But on a happy note, she would be a kickass mum.