User blog comment:Miskos3/Fairy Tail 525: Why Did the Emperor Never Love His Child?, Review/@comment-5303512-20170304145630/@comment-2214433-20170304231623

This page

If you're not looking at it as something that happened within a minute, it's possible. Like, within this page. Before/at the last two panels. Hell, there's even a drop of cum at the bottom

I'm not even sure how else I'm supposed to explain it, I'm not even saying that this interpretation is true, but rather a possibility which I'd prefer over Zeref screwing with Mavis' comatose body.