Long-distance emotional connection

(Important context to understand the story: I am female.) When I was in high school in the mid-90s, I dated a girl whose dad was rabidly homophobic. We had discussed the fact that if he ever found out about our relationship, he would probably flip out and kick her out of the house. We also agreed that I would never call her at home or contact her in any way that he could find out about. One evening I was sitting at my desk doing homework, when all of a sudden I experienced a distinct wave of fear and panic that I knew was somehow connected with her. About an hour later, I got a phone call from her to tell me that her dad had found out about our relationship and, as we had predicted, reacted in a very scary and threatening way. After some discussion we worked out that he had started yelling at her at about the same moment I experienced the sudden wave of fear. I've never known what to make of the fact that I seem to have shared some of her emotions without knowing why.