There's quite a lot of difference between her "I won't tell you anything about what I did for the last seven years," and your "I was single for ten years." Did you tell your fiance about going to school and stuff? Work, travel, family, religion, sports, fandom? Or only about your previous romantic relationships?
There are lots of episodes a person might want to put behind her after 7 years. Maybe she's been under the hill. (I like Ellen's idea, above, but it's more common for people to be kidnapped by the fae (creating 7-year gaps in their histories) than for the fairy queen herself to turn up in this kind of situation.) Maybe she had trouble with drugs and now she's done with rehab and/or out of prison. Maybe she flunked out of grad school and doesn't want to think about that subject. Maybe she was involved in a cult. Maybe she had a baby. Maybe she was sick with something stigmatized.
no subject
There are lots of episodes a person might want to put behind her after 7 years. Maybe she's been under the hill. (I like Ellen's idea, above, but it's more common for people to be kidnapped by the fae (creating 7-year gaps in their histories) than for the fairy queen herself to turn up in this kind of situation.) Maybe she had trouble with drugs and now she's done with rehab and/or out of prison. Maybe she flunked out of grad school and doesn't want to think about that subject. Maybe she was involved in a cult. Maybe she had a baby. Maybe she was sick with something stigmatized.