From last week's session, photographed in the older sister's bedroom with natural light. The younger one (left) is a gifted gymnast, and her sister (right) is a dancer.
I think the fact that it's a mirror in the background (isn't it?) adds something. And is that an image of you, Cheryl, in it? Can't quite make it out - but I don't think that matters. it appears as a mirror and having that between them, at this stage in their lives and especially as they're 'little stars' seems to add something. As you say, anyway, this is spontaneous and more 'documentary' than formal portrait.