AIO - asked wife if she blocked a guy she cheated on me with in the past .

Short backstory - wife cheated on me around 1 year to 1 1/2 years ago( just kiss as for as I’m aware) with coworker who she works across Monday-Friday, they both handle almost every meeting together, obviously makes me insecure so I need some reassurance from her end. She has him blocked on her main account but recently she created a new book account which is her reading kindle books and reviewing them .He followed her and to me it’s he can see her interests and give likes on the books he likes so it didn’t sit right with me, first time I asked her to block him which was weeks ago her excuse was that it was a public account so anybody can follow her, the fighting went on and off for the next few weeks, last night she finally decided she’ll block him and supposedly did it and I left it at that. That night something was bothering me so I checked her account and his likes were still there. I googled it and supposedly the likes disappear too when you block someone. So I ran a small test with a friend of mines and I find out the likes do disappear. When I brought it up to her as to how come his likes are still present , she lashes out and gets all defensive, I’m unsure if she told him to unfollow me or if I’m just overthinking and it was an app issue.