What kind of body language is this?

Hi everyone I'm wondering if anyone can help me figure out what kind of body language this is….

Back story we brought home a 12 week old puppy 4 days ago, our current dog is 4 and of course a very spoiled (past) only child. She is not super fond of him and I have seen some toy possessiveness from her when the puppy approaches, she s nipped at him a few times and thankfully he has taken to being around her but not too close. Hes a very reserved puppy which may or may not be helping the situation. We no longer allow toys when they are together in the same room to mitigate possible conflict. She generally plays well with other dogs but will correct if she feels like it. We do also limit their contact to when we can watch both of them.

The reason for this post though is she typically shows no interest in him unless we are outside, then she will try to get him to chase her but because he's a large breed puppy and still unsure of his surroundings and quite clumsy he's not the best chaser yet. But the other day we were giving him some chill time and she hopped off the couch and was doing this. No my first thought was "I'm the queen of this house" vibes but I'm unsure. It doesn't look particularly playful, maybe just more curious? Or even some anxiousness there as well based of her eyes.

We are continuing to take things slow and allow both of them to settle in with each other but this moment struck me as odd and made me laugh but also caused me a little bit of confusion!