Man, just when you though it was over.. miki admits it, and says she has to decide what to do with MM.... and so it goes on 
Also, why the hell did she admit it when UFA was denying everything, does she want out?
UFA did not deny anything.
According to a report by FujiTV, someone at UFA said that there was no proof
in the Friday article that they were dating. So far UFA has not made an official statement. Now they will issue one, with all the facts at hand. And Miki admits it because:
1 - it is true, and EVERYBODY knew it was true, so no point in denying it now
2 - she probably wants to keep dating the guy, so there's a chance they will be caught again, and it would look worse than admitting it now
3 - since she's an adult, and there's nothing illegal involved, the only thing that may suffer is her status in MM. Worse case scenario, she steps down as Mari did, but unlike Mari, she still has GAM and she's in the middle of a concert tour now, so I don't think UFA will cancel the tour because of this.