[quote=Expllo]
That too!If they were older they'd be represented as older (Not represented as they are in the show, i.e twelve), and if they weren't related in that specific fan-made material then that should be stated or you should provide proof where they do state it....Otherwise the fan gif is twelve year old incest and that's just how it is 
[/quote]

its just a gif of a brother and sister messing with each other..no need to overthink it..just ignore the possible incest part xD