Angel in the Woods

Me and my boyfriend are on vacation in the old Evil Dead-ish like cabin/cottage in the middle of deep and dark woods. One evening in the forest we find a naked girl that is covered in thick mud and exhausted. We help her to get to out cabin, start fire to warm her up and prepare hot water to clean her and some spare clothes. When she is clean, she says something in some kind of ancient language and seduces us. When we all have orgasm is looks like she spreads her wings. We fall asleep together and when we wake up, she is gone and there is only few feathers left on the pillow.