Actually, I think she did have romantic feelings, given the contents of her text messages. And I think his failure to respond to that prompted her accusation.
Two of them are detailed in the daily beast article.
If there were 3 additional people who claimed that Joe Biden had sexually assaulted them, people who had the same kind of close contact with Biden that Nungesser's accusers had with him, would that in any way affect your belief regarding Reade's accusation, or would it not matter at all?
One of Nungesser's accusers barely knew him. Another was an ex-girlfriend who did not start to think of her time with him as 'problematic' until months after their relationship ended (she probably started reading feminist propaganda). I don't know the details of the third person who accused Nungesser.
Now, as it is, I did not say whether or not I believed Tara Reade. But yes, if multiple independent people come out against Biden, that is more evidence against him.