You nod and smile, and Julie positively beams at you, taking the time to fly over and give you a quick kiss on the cheek. You fly after, smiling a bit and shaking your head. She really should be more careful, flying out of the woods, but at least that means that, if something is out there, it won't get *you*, and you should see it in time to warn your sister, anyway.
Besides, you get a better view of her ass, this way. You know it's naughty, even for a Faerie, but you can't help but admire the view. She's much too exact your copy not to be attracted to her body (narcissistic, Faeries? Never...).
Nothing leaps out to ravish or eat you sister, and you both make it safely to the bird bath. You land on the edge, keeping watch, but Julie slides right in, giving a small "Wheee!" of sheer delight at the still hot water. You slide softly in yourself, sighing at the way the water warms your naked thighs, lap against your most private parts, and finally almost envelop your ample bosom. You allow yourself a few seconds to watch your sister frolic, wondering once more if those breasts are as supple and fine to the touch as yours, admiring the droplets of water clinging to her skin, and then you start keeping watch again, submerging yourself enough not to be so visible.
There is a risk, here. Your beautiful gossamer wings can't carry you aloft when dripping wet, and it takes a precious second or two to shake off the worst - a second which has meant screaming, horrible death for many a Faerie before. You suppose, one day, something will get you, too, but you intend for that day to be far, far away.