Well, the author expressly says it's a shipping picture, so it comes off as kind of pushy from your end. There are *tons* of Momlestia pics out there, and no need to claim this as one of them. And since the gesture of giving feathers is never shown in canon, it's purely fanon anyway. Authors choosing to evoke it are evoking the intent in fanon, unless expressly stated otherwise. The same way if somebody is shown with Dinkie being held by Derpy they aren't showing a child kidnapping or a mail pony getting touchy-feely with somebody else's filly. Also, when Twilight blushes out of insecurity her ears fold back. They're perfectly erect here.