This is so, so delightful! Wonderful details, and your prose makes the whole thing come to life - ah, the glorious ordinariness of it all. I am utterly charmed by the whole thing. I think my favourite moment was this -

Sirius loves Dorcas even if he can't work out how quite to take Marlene and her campaigning and effervescence. Dorcas is dry and sarcastic and likes to yell at the Quidditch matches on the radio whilst Remus and Marlene talk about the 'other' and theories of exclusion.

So much going on there, a real sense of history and many, many conversations that have gone on and will continue to do so.

Also, good heavens, how exactly is it I don't have you friended already? *rectifies*