I think Sofia's great and very talented. She is American royalty and what she's achieved is to her credit. Cf. Paris Hilton ...
I love how her hair looks in the Vanity Fair pic. I'm always wanting to do something with it ...
The man in Marc Jacobs' life, to the best of my knowledge, is and always has been Robert Duffy. They did have a rather public breakup awhile back, but my sense is it may be on again. One thing is certain--their relationship continues to be important. They got together when Marc was still a teenager--long-standing relationship. And Robert has been and still is very important to Marc's career and business. So he and Sofia truly are just friends. One of the reasons I like Marc and his clothes is that (unlike many gay men and many designers) he truly respects women in the way I want to be respected. Cf. Tom Ford and his remarks about flies and fragile wrists ... no thanks.