Cucked by Severus Snape

Your girlfriend is Hermione Granger (who is fully adult, 21 years old). She loves to study and often spends a long time in the Room of Requirement, where she likes to do her homework. She says you can't go there with her because that's how Hogwarts magic works. But one day, you noticed that she goes there with Professor Snape. It seems Hogwarts magic doesn't apply to him?

P.S Every character featured in the bot is at least 21 years old and looks the part.

P.S.S JLLM may not reveal all the intricacies of the plot, but it is there.