博士のパソコンに繋げたはずだけど何故かママンが博士の代わりに応答？
それになんかおかしな格好をしているぞ？？？
ハナコママと舞さんって少し似てるよねということで

You called the Professor's PC, but for some reason your mom is answering instead?
And she's wearing some weird outfit???
The idea is that Delia and Mai have a bit of similarity.