Contains random bar sex, dub-con if you squint, threesome, set in New York City's wizarding community (in case that sort of thing annoys you)

This was originally written for sashaminx for the 2011 harry_holidays fest, where it was read by at least 10 people! At least, that's how many comments it got. This version has been slightly rewritten from what was posted there, since I figured not many folks saw it there and I could fix it up a little more. The original version was beta'd by wordplay and lusiology. In case you're wondering, the title is a mashup of two adages about jealousy.