[ She wants to yell at Sayaka so much that it's for her own good, or maybe even cover it up and yell that it's none of her business - anything that will make her back off. But somehow she just knows it's not going to happen, Sayaka is too stubborn to back down, so.. there's no way out except for just actually answering the question. As painful as it is.

It makes her take a deep breath, and she grabs Sayaka's arm to try and pry her hand off her own arm. ]

If you wanna know so badly, I'll tell. Just sit down calmly, I'm not gonna deal with you freaking out all over me while I tell.

[ .. Another sigh. Man, she's not looking forward to this.. ]

Sayaka, what do ya think happened to you?