I like the piece, but somehow "mom" is a bit off. It's her neck area... although it is with a high collar, it seems like her head is pushed in her shoulders.
That aside, I agree with the comment that it's nice to see a work about Elisabeth that's not somehow only about her "looks"...
Oh, and uhm. This portrait with Daddy is Comstock. Not Booker. Eventhough it's probably played by EVERYONE by now, it might still be a Spoiler to people who didn't play it... ;-)