This beats the hell out of most post-Voldie continuation fics focused on personal relationships. Just gives off a vibe of rightness and is very well-written to boot.
I also like how it offers a much more believable route for the threesomes (which are thankfully limited to two known triples) to have formed rather than the women being some sort of subservient devotee to the male of the relationship. The fact that they're hinged around one of the females initially (Tracey and Hannah, specifically) makes it even more genuine.
Great story, and I'd really like to see more of it.