Keep on keeping on if you have more questions! And yes; she didn't know why, but honestly, Vanessa must have thought she was stupid. (That, actually, may rankle more than anything else. A lot of people have assumed Mina was stupid. She thought Vanessa knew her too well for that.)

She would have pushed the issue, but she -- well -- was a little frightened by the way she felt about Vanessa, at the time.