It wasn’t her, it was another student that had the relationship with the teacher. Sakura had a one sided crush on her brother’s friend (later implied boyfriend).

Her father though, met Sakura’s mother when she was a high school student while he was a teacher.

A real life example, I know a company whose low level employees use a Dell mini pc with a custom OS whose only job is to RDP into Citrix. All the data and compute is on the cloud.