I understand where she's comin from, when I was young I used to think it's better to just be straight as well (I'm bi-romantic). It's easier, and you won't get into any trouble with your family. She's not coming from a malicious side, but she ended up taking the wrong decision. She should've just communicated her uncertainties and worry since the beginning, and accepted he's answer after the got it.
I understand where she's comin from, when I was young I used to think it's better to just be straight as well (I'm bi-romantic). It's easier, and you won't get into any trouble with your family. She's not coming from a malicious side, but she ended up taking the wrong decision. She should've just communicated her uncertainties and worry since the beginning, and accepted he's answer after the got it.