"Dad never comes to these," Elspeth tells her grandma. "Too many strange Bells. If there were strange Edwards, Mama might have trouble with them too, but there aren't so far. But I can reintroduce you now, if you'd like."
"I believe somebody floated the idea of Bella hiring me as imperial personnel officer. Sounds like a nice job."
"Reasonable. But not the most efficient it could possibly be. I like efficiency," she says.
"It would've been harder to keep a lid on it if it was both of us."
Saving Edward was the priority. Saving herself would have been nice, but was strictly optional.
"In 2005, when Elspeth was very, very young, the Volturi caught me. It was standard procedure, at the time, for Chelsea, or Addy copying her power, to destroy all the magically unprotected relationships of a captured witch. So that in the event we ran away, we'd be less likely to find old covenmates, and spread the story. Chelsea couldn't affect mate bonds. That was it."
Personally, she doesn't run to the incandescent. She is very room-temperature about it. But Chelsea is an intolerable threat and needs to be erased as thoroughly as possible. So it's nice that Bella took care of that for her. She is a good empress and can have a cookie.