I was searching for some Ayumi's websites, when I stumbled upon this web article:
http://asia.elliottback.com/archives...akis-abortion/
And it said that Ayumi was pregnant and this is the main (Or is it?) reason that Tomoya broke-up with her. It also states that she went for an abortion in a private hospital which won't reveal details of their customers.
Seriously, if this is really false, we shouldn't really treat her as some sort of a exotic male magazine stars. Appreciate her natural beauty instead.