Honestly, I never pay attention to who likes my pins, so I would try to just ignore this. I don't think it's significant enough to try to figure out what she's thinking or to block her from doing it in the future.
I'm a Black Friday abstainer. We're having a quiet day at home.
Me: 44 H: 44 Kids: 20, 16, 16, and 10 Together/Married: 22 years H announced he was emotionally detached and considering D: 4/4/16 H announced he is going to try to stay and reconnect: 5/1/16