。。
Is she coming too? I hope she does.
Literal
She [also-も] come [question-のですか]. Come [if-と] good [copula-のですが].
来るのですか asks politely whether she's coming. 来るといいのですが uses ~と ('if') + いい ('good') + のですが ('I hope/wish') — a polite expression of hope with が trailing off. A warm, wishful statement.