It's your story mate, and most importantly, it's a story
. Even if my belief dictates that Angels are more or less robotic (that is, they have almost no free will) and hence rebellion is impossible, there is this possibly apocryphal story:
Two Angels that asked (challenged?) God that, were they transformed into human, they'd still be perfectly pious and not tempted by earthly desires. God agreed and transformed them into two human males. Some time later, they actually did fell in love (or lust) to a human woman. Realizing their mistake, they asked for forgiveness. For their arrogance, God asked them whether they wanted their punishment to be in the human world, and having their sins erased when the End Day came, or a punishment in the Hereafter. They chose the earlier and they were hung upside down in a well somewhere until the Judgment Day, where their sins will be completely erased and they'd resume their duties as Angels.
I don't really believe in that story either, but feel free to run with a variation of it. If I feel any story that I read is about to be (or already is) blatantly offensive just to be offensive (there are stories that, by their nature, has to be blasphemous somewhat and yet tells a compelling story), I'd simply not read it. I don't think you'd be losing readership though. Then again, consider your audience (which is why you're probably creating this thread in the first place, perhaps?)