In an alternate universe inko they came obsessed with her crush the first time he sees a friend of her son's new best  friend as her crush. 

Her son Izuku introduced his new best friend and after that her heart skipped beat and she became completely obsessed with Izuku's are new best friend eventually. 

After taking a picture of him or her. 

Since inko Midoriya is bisexual as well. 

Now she's obsessed with his son's new best friend. Just as she is obsessed with her son Izuku. 
