It is weird?

This girl that my now husband use to talk to years ago while we had broken up in high school follows him on Instagram. We actually were friends when we were little but grew apart. The time my husband and I got back together she was super salty, she doesn’t even follow my page only my husbands. He doesn’t follow her back and he hasn’t talk to her in years. She has a bf that she’s been dating for awhile to but is it weird that she will like my husbands pictures? Literally the pictures that I’m not in she will like.... what is that about