User blog comment:IamJakuhoRaikoben/Chapter 450: Alone in all the World, Review./@comment-5894890-20150831164039/@comment-25111584-20150831194951

For Zeref's part, love at first sight, but decided to suppress his lolicon instincts so as to spare Mavis' life. Immediately took his chance when it appeared, but ended up unexpectedly killing her in the ultimate faux pas.

For Mavis' part, she was just too shocked and accepted it.

Dunno, don't really see the point in expecting Mashima's ships to make sense. >.>