At least Madoka looks much, much less surprised by the transformation. She's already seen it before, after all, and she thinks Maru is helpful enough that it's not a surprise either that he'd want to help with this. She just thinks it's sweet..

But she can - at least - notice that Nita seems a bit more surprised. So she first gives Maru a smile and a "Thank you, Maru.." before turning to look at Nita.

"Um.. Sorry if you got surprised! Maru isn't exactly a regular cat.. But he's still super cute!" At least Madoka seems less embarrassed now than a moment ago.