It looks like you're referencing a specific release from the site, following their classic naming convention: good guide looking into Met-Art.com.13.01.31.Katya.Ac.Nadira.A.Infuse.X...
Based on the pattern, this likely points to a set released on , featuring model Katya A. (also known as Katya Clover or similar, depending on the site’s naming), and possibly involving photographer Nadira A. (a known Met-Art contributor) with the set titled "Infuse" or similar. The .X... might be a partial file reference.