After All This Time?

I’m assuming that this t-shirt is in reference to the Harry Potter story when Prof. Snape tells Dumbledore that “after all this time” he still loves Lily and shows Dumbledore his Patronus? Well, Snape’s Patronus spell was a doe - the same as Lily’s. The stag was James’ & Harry’s Patronus. But, it is still a really cool t-shirt.