Here's how the scene in POA should have gone.
Snape: Listen to you two, quarrelling like an old married couple.
Sirius:
Remus:
Sirius:
Remus:
Sirius:
Remus:
Sirius: Technically we're still engaged-we never had our wedding, did we Moony?
Remus: *Sighs* Now is not the time Sirius.
Sirius: *Grumbles to himself* Now is not the time, please I know all about time-I had twelve years of time... in Azkaban!
Harry: um... congrats...?
Snape: what the fuck
Harry: Jealous that even two people you hate have love while you're just a miserable, single thirty -something year old