Mrs Hawking! From the Church Of Pendulum Based Island Finding. She was also the blond lass on the island (1953 segment) in Jughead.
That's right....I think....
I knew she was the chick from back in time, but I didn't make the connection to Hawking. Good catch there.
BTW, I will say this about Ben. His Dad's asshole-ness led him to hate the Dharma Initiative and support the Hostiles. If it weren't for that, he wouldn't have busted out Sayid and gotten shot. It wasn't entirely Jack and Sayid's fault.