I think she's just in such a tizzy that she's not thinking about what's going on. (Which is why she gets her sister's names wrong, then openly talks about a surprise to the person she's trying to surprise.)
☆Asashio-neesan☆☆Asashio-neesan☆ReadArashio!!Arashio!!!Araa~♪
Is that Micchan?Such a wonderful smile, isn't it~(^^)Don't you think!?
Don't you think!?Huh, wha—What did you say!!!??The smiling Michishio is right here~ Catch her quickly~♪Adapted from Arashio's MVP line.Something like that, maybe~